Egyptologists believe there was a perfect pyramid, hidden in the sands of Abu Rawash, which served as a tomb for the pharaoh Djedefre.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

At the heart of Saqqara, the largest necropolis in Egypt is the Step Pyramid of Djoser, built around 2600 BC.

A Nazi fortress could have changed history if finished; an underwater graveyard harbors American treasures; a network of tunnels in New York were abandoned for mysterious reasons.

The tragic story of Archduke Maximilian and the series of unfortunate circumstances that doomed his reign over Mexico.

An inside look at how the world's most eminent structures define national identity and the engineering techniques used to create them.

An exploration of the astrophysics of stars creating matter.

An exploration of the science behind the Anthropic Principle.

A vanished Neolithic structure in an Irish farmer's field, an ancient oasis in the remote reaches of a Chinese desert, a centuries-old buried treasure in the UK and a dreaded predator in the Pacific Ocean are discovered by accident using drones.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

A wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

Isaac Brock's daring made him a hero, but may also be his flaw.

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Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

Relive the Flight of the Crow, a trek across Nazi-occupied Europe; find out how two Austrian mountaineers hiked their way out of the Himalayas, then learn why 378 Japanese POWs risked it all in Australia's bloody Cowra Breakout.

Examine how German soldiers used an erotic painting and other decoys to distract their captors as they tunnelled out of Island Farm POW camp in Wales; see how American bombardiers were smuggled out of Russia, and study a wartime Trojan Horse plot.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

British Commandos raid two occupied Norwegian islands to wipe out fish oil factories used to make explosives.

In February 1945, Allied forces lead an attack out of the Netherlands and onto German soil west of the Rhine; a Canadian battalion administrator must assume command of a company and lead it into battle.

When his company attempts to capture a small village, an American soldier, born in Mexico but raised in Texas, must crawl through an enemy minefield to capture two German machine gun nests holding up his unit.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

In April 1945, the Yamato, the largest battleship in history, leaves for Okinawa to destroy American warships and prevent their landing; weighing 70,000 tonnes and armed with 150 guns, it faced the U.S.

In May 1905, after a year of stalemate in the Russo-Japanese War, Russia's Pacific squadron arrives at the Tsushima Strait.

On D-Day and later in June 1944, the USS Texas helps silence batteries of German artillery and gun positions defending the landing beaches and the port city of Cherbourg.

The story of how 20th-century dictators took absolute power and what drove them to seek it.

Scientists fly to save Anchorage from avalanche destruction. Border agents stop a potential insect invasion at Anchorage International. A bush pilot flies explosive cargo for a village festival, and the Coast Guard race to repai.

In the wilds of Southern Africa, aviation takes over where roads don't go. Extreme Airport Africa brings you into the world of high-octane, high-risk bush flying where pilots brave rough runways, wild fires and wild animals.

A deserted town in Spain with a bloody past and a ghost fleet heading nowhere are homes to dark American secrets, and new discoveries reveal how they were built and why they were abandoned.

The story of how 20th-century dictators took absolute power and what drove them to seek it.

Scientists fly to save Anchorage from avalanche destruction. Border agents stop a potential insect invasion at Anchorage International. A bush pilot flies explosive cargo for a village festival, and the Coast Guard race to repai.

In the wilds of Southern Africa, aviation takes over where roads don't go. Extreme Airport Africa brings you into the world of high-octane, high-risk bush flying where pilots brave rough runways, wild fires and wild animals.

Charles de Salaberry is forced to rely on cunning tactics.

With her husband wounded, Laura Secord sets out to warn the British of a possible American attack.

A Nazi weapon designed to turn the tides of WWII in Northern France; a secret Russian military tower in the shadow of the Chernobyl disaster; a forgotten Australian tunnel rumored to hide a nuclear lab; something shocking buried under Alcatraz.

A special drone uses cutting-edge technology to fly deep into treacherous, hard-to-reach mountains on dangerous search and rescue missions, and a hi-tech ice machine works tirelessly at a Toronto airport to keep flights running in brutal conditions.

Exploring machines invented for human survival in the extreme cold across the planet.

Tecumseh forges an alliance with the British in pursuit of his dream.

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Eye-witness accounts from those who fought in the US military's bloodiest battle on the European front in World War II.

Rare archive footage charts the German Army in 1940 as it unleashes a new Blitzkrieg tactic.

A drone team at the location of the Battle of the Bulge hunts for the long-lost encampment of an African American troop.

It is 1943, and the Allies launch a campaign to liberate Italy from the occupying Nazi forces; Military experts use the latest drone imaging technology to understand how the Nazis used the Italian landscape to their advantage.

Between 1940 and 1942, the Axis powers unleash over 3,000 bombing raids on Malta, an island key to controlling the southern coast of the Mediterranean; Conflict archeologists use cutting-edge drone technology to explore the defenses of Malta.

Uncover the luck and determination that helped POWs endure captivity, hunger, and acts of unthinkable brutality. Listen to the riveting stories of soldiers who survived infamous German stalags, Japanese forced-labour campaigns, and death marches.

Get insight into one of the war's most hazardous jobs: piloting aircraft. Explore the constant race to provide more aerial firepower, revisit one of the war's most daring raids, and hear from a glider pilot who risked it all the night before D-Day.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

The engineering secrets behind a massive sky garden in Singapore, the world's most slender tower in Brighton, and a railway station in the shadow of Vesuvius.

A haunted lighthouse on Lake Michigan, a town where everyone seems to have vanished all at once, and a secret complex of tunnels beneath London are deserted engineering projects.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

The engineering secrets behind a massive sky garden in Singapore, the world's most slender tower in Brighton, and a railway station in the shadow of Vesuvius.

John Norton leads Six Nations warriors against the invading Americans.

East coast shipper creates a private fleet to seize American ships.

Over a hundred massive concrete arrows scattered across America; a giant chalk figure with an oversized phallus on an English hillside; a mysterious hole in the middle of a lake in Southern California.

Crawling down the Red River, the Amphibex protects those who live along it during the thaw, while the Hercules C-130 J takes to the Arctic skies of the Canadian North; preparing for summer exploratory missions is Swedish built icebreaker Oden.

The Grasslands National Park protects the North American mixed grass prairie.

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Military search and rescue efforts in deadly arctic conditions rely on a specialized helicopter with unrivaled power and endurance, and special access reveals how it works; in the Alps, a monster snow blower keeps trains running in dangerous weather.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

The first invasion of the Italian Campaign of WWII: Operation Husky.

A secret British regiment in 1942 led a daring raid on a Nazi-occupied Libyan harbor.

An elite squad of Norwegians destroy a power plant in 1943 that the Nazis may have been using for nuclear weapons research.

How a rocket changed the course of WWII and space flight.

In direct violation of Hitler's orders a German U-Boat Commander sinks a passenger ship on the first day of the war sparking an international crisis.

Navigating the narrow, deep fjords that lead to Narvik, Norway, where German and British forces faced off in April 1940; repeated torpedo failures threatened to sink the mission and leave Hitler's invading troops exposed and vulnerable.

Hitler's final days are revealed through recently discovered eyewitness accounts.

Allied convoys resupplying the Soviet Union navigate the Arctic, infested with U-boats and enemy aircraft.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

The rise of submarines marks World War II at sea, leading to fierce battles above and below the waves.

On July 3, 1940, the British fleet attacks the French navy at Mers el-Kébir, Algeria; in ten minutes, Bretagne sank, Mogador was destroyed, and Provence and Dunkerque were grounded.

The discovery of a burial shaft filled with priceless gilded coffins provides insights into what happened when Greek rulers took over ancient Egypt.

Catastrophes have destroyed civilisations in the past; from pandemics to climate collapse and asteroid crashes, ancient disasters reveal much about today's world.

When the lost tomb of King Tut is opened in 1922, it's not only the famous Curse that is unleashed.

Experts go on a search for New York's most remarkable hidden stories, involving the Statue of Liberty, the 21 Club, and "Typhoid Mary.".

The discovery of a burial shaft filled with priceless gilded coffins provides insights into what happened when Greek rulers took over ancient Egypt.

Catastrophes have destroyed civilisations in the past; from pandemics to climate collapse and asteroid crashes, ancient disasters reveal much about today's world.

When the lost tomb of King Tut is opened in 1922, it's not only the famous Curse that is unleashed.

Despite being the second smallest park in Canada, Point Pelee bird watching reputation is huge.

The civilization of the first and finest national park in Canada, is surrounded by untamed wildlife.

A Turkish drought reveals a long-lost ancient Basilica and its secrets; a church spire punches through the surface of a toxic sludge in Romania; the hull of a massive ship in the North Sea answers decades old questions.

The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business; experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions.

The Bruce Peninsula is the largest natural landscape remaining in Southern Ontario.

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A helicopter made for extreme environments aids US Army rescue efforts in some of the most harsh conditions; a trio of small but capable tugboats moves cargo vessels through the busiest port of Alaska.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A look at some of the most incredible escapes of World War II.

A look at some of the most incredible escapes of World War II.

A look at some of the most incredible escapes of World War II.

Cameras roll as Nazi Germany launches an all-out assault on the Soviet Union.

Footage of life and death on the battlefield of El Alamein and behind the lines in the African desert.

Uncover the luck and determination that helped POWs endure captivity, hunger, and acts of unthinkable brutality. Listen to the riveting stories of soldiers who survived infamous German stalags, Japanese forced-labour campaigns, and death marches.

Get insight into one of the war's most hazardous jobs: piloting aircraft. Explore the constant race to provide more aerial firepower, revisit one of the war's most daring raids, and hear from a glider pilot who risked it all the night before D-Day.

A mysterious pyramid built out of Cold War paranoia; a haunted prison; a cluster of structures in the Atlantic; the mystery of a secret structure on a mountain and an industrial compound are revealed.

The Pacific Coast of Australia is home to Sydney's architectural icons, Byron Bay's iconic beach breaks, perilous white-water adventures, and the Great Barrier Reef, the largest living structure on Earth.

The clifftop ruins of Tintagel Castle are shrouded in a tumultuous history and believed to be the birthplace of King Arthur; experts use cutting-edge tech to unlock the secrets of this ancient structure and reveal the truth behind a legendary ruler.

An exploration of little-known stories behind San Francisco landmarks and locations, including its golden fire hydrant and Dutch windmills.

A mysterious pyramid built out of Cold War paranoia; a haunted prison; a cluster of structures in the Atlantic; the mystery of a secret structure on a mountain and an industrial compound are revealed.

The Pacific Coast of Australia is home to Sydney's architectural icons, Byron Bay's iconic beach breaks, perilous white-water adventures, and the Great Barrier Reef, the largest living structure on Earth.

The clifftop ruins of Tintagel Castle are shrouded in a tumultuous history and believed to be the birthplace of King Arthur; experts use cutting-edge tech to unlock the secrets of this ancient structure and reveal the truth behind a legendary ruler.

The Pacific Rim National Park Reserve is one of Canada's most beautiful and powerful parks.

This oldest National Park in the Canadian Maritimes is home to the highest density of moose in the world.

Nubian pyramids reveal the rise of female power in Ancient Kush; a shocking satellite image uncovers secrets of an ancient ancestral Puebloan site in New Mexico.

After the landing on Normandy Beach, the Battle of Carentan breaks out and an American unit launches a desperate bayonet charge.

An inside look at the P47 Thunderbolt and the critical role it played in both the European and Pacific Theaters of World War II.

Emerging as a rival to Boeing's 247, the rigorously tested twin-engine DC3 would eventually radicalize the aviation industry in 1934.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

Allied and Axis forces push science and engineering to the limits to gain the upper hand; Aerial drone footage and Lidar technology uncover evidence of military aviation innovations that played roles in key conflicts of the European campaign.

Military experts and historians crisscross Europe to revisit the war's most iconic sites to uncover untold stories and long-forgotten secrets.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

American paratroopers are dropped behind German lines on D-Day in order to secure territory behind the beaches.

British Commandos raid two occupied Norwegian islands to wipe out fish oil factories used to make explosives.

Allied convoys resupplying the Soviet Union navigate the Arctic, infested with U-boats and enemy aircraft.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

The rise of submarines marks World War II at sea, leading to fierce battles above and below the waves.

On July 3, 1940, the British fleet attacks the French navy at Mers el-Kébir, Algeria; in ten minutes, Bretagne sank, Mogador was destroyed, and Provence and Dunkerque were grounded.

The story of the mission to destroy the great dams of Germany in using a new bouncing bomb.

Dictatorships are usually unsustainable as their thirst for more power inevitably leads to ever greater oppression, which breaks the nation; eventually, all dictatorships fall.

Incredible footage, colourised for the first time, chronicles the final days of the Third Reich and the brutal battle for Berlin, though German defeat looked certain. Nazi soldiers persisted fighting despite the inevitability of their downfall.

The story of the mission to destroy the great dams of Germany in using a new bouncing bomb.

Dictatorships are usually unsustainable as their thirst for more power inevitably leads to ever greater oppression, which breaks the nation; eventually, all dictatorships fall.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

Relive the Flight of the Crow, a trek across Nazi-occupied Europe; find out how two Austrian mountaineers hiked their way out of the Himalayas, then learn why 378 Japanese POWs risked it all in Australia's bloody Cowra Breakout.

Examine how German soldiers used an erotic painting and other decoys to distract their captors as they tunnelled out of Island Farm POW camp in Wales; see how American bombardiers were smuggled out of Russia, and study a wartime Trojan Horse plot.

The story of the mission to destroy the great dams of Germany in using a new bouncing bomb.

The Torngat Mountains National Park was set up in part to return the aboriginal people to their birthright.

Riding Mountain National Park in Manitoba.

Strange markings in the remote reaches of Northern Finland; drones find a Manhattan-sized mystery in the depths of a Vietnamese cave; secrets are no longer hidden in the Antarctic; a lost sky-high world in Mozambique gets a visit from above.

In the opening weeks of World War II, a German U-Boat Commander launches a shocking attack against the Royal Navy in its own home port.

In direct violation of Hitler's orders a German U-Boat Commander sinks a passenger ship on the first day of the war sparking an international crisis.

On Christmas morning 1944, an Allied merchant ship off the coast of Australia fights off a torpedo attack by a German U-Boat with its deck guns.

Uncover the luck and determination that helped POWs endure captivity, hunger, and acts of unthinkable brutality. Listen to the riveting stories of soldiers who survived infamous German stalags, Japanese forced-labour campaigns, and death marches.

Get insight into one of the war's most hazardous jobs: piloting aircraft. Explore the constant race to provide more aerial firepower, revisit one of the war's most daring raids, and hear from a glider pilot who risked it all the night before D-Day.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

The story of the mission to destroy the great dams of Germany in using a new bouncing bomb.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

Relive the Flight of the Crow, a trek across Nazi-occupied Europe; find out how two Austrian mountaineers hiked their way out of the Himalayas, then learn why 378 Japanese POWs risked it all in Australia's bloody Cowra Breakout.

Examine how German soldiers used an erotic painting and other decoys to distract their captors as they tunnelled out of Island Farm POW camp in Wales; see how American bombardiers were smuggled out of Russia, and study a wartime Trojan Horse plot.

A look at some of the most incredible escapes of World War II.

A look at some of the most incredible escapes of World War II.

A look at some of the most incredible escapes of World War II.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

Bad design, human error and the enemy sent great ships to tragic ends, like Britain's K13 submarine and HMS Hood, Sweden's 17th century Vasa, and Kublai Khan's fleet, sunk by the original kamikaze.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

A unique tour of London explores objects with secret histories, including its black cabs, the Marble Arch and the Horse Guards Clock.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

Bad design, human error and the enemy sent great ships to tragic ends, like Britain's K13 submarine and HMS Hood, Sweden's 17th century Vasa, and Kublai Khan's fleet, sunk by the original kamikaze.

Fundy National Park in southern New Brunswick.

Terra Nova National Park on the Newfoundland coast is a beautiful enigma with a rugged forest.

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

An American submarine commander manages to penetrate the defenses of a Japanese convoy in the Luzon Strait; the tables are turned, however, when the convoy's escorts go on the attack.

After a spectacular collision and ensuing attack from a Japanese ship, an American submarine crew begins a desperate struggle for survival.

As carrier groups deliver destruction to Japanese strongholds, American subs risk everything to surface in enemy waters and rescue downed aviators.

The story of the mission to destroy the great dams of Germany in using a new bouncing bomb.

In April 1945, the Yamato, the largest battleship in history, leaves for Okinawa to destroy American warships and prevent their landing; weighing 70,000 tonnes and armed with 150 guns, it faced the U.S.

In May 1905, after a year of stalemate in the Russo-Japanese War, Russia's Pacific squadron arrives at the Tsushima Strait.

On D-Day and later in June 1944, the USS Texas helps silence batteries of German artillery and gun positions defending the landing beaches and the port city of Cherbourg.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

Dictatorships are usually unsustainable as their thirst for more power inevitably leads to ever greater oppression, which breaks the nation; eventually, all dictatorships fall.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

The German war industry urgently needs more iron; Hitler has his eye on the Norwegian coast and especially on the harbor of Narvik, through which iron ore is shipped from Sweden.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

Uncovering the inspiring stories of the U.S. Army's 761st Tank Battalion; descendants and historians discuss the honour the first armored unit of its kind, entirely composed of African-American servicemen.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

The engineering secrets behind a massive sky garden in Singapore, the world's most slender tower in Brighton, and a railway station in the shadow of Vesuvius.

Meidum is the least-known of the pyramids of Egypt as it stretches skywards to resemble a castle keep.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

The engineering secrets behind a massive sky garden in Singapore, the world's most slender tower in Brighton, and a railway station in the shadow of Vesuvius.

Quttinirpaaq National Park is affected by climate change.

Visitors from around the world come to La Maurice National Park each fall when the leaves change.

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

The story of fast food is the story of the American Dream; from a converted streetcar in Wichita, Kansas, the humble patty goes on to global domination; fried chicken turns a serial failure into a serious success; a burger ends the Cold War.

Where earth meets sky: how the most thrilling and dangerous point at the top of the world continues to fascinate, and what it takes to conquer the Big One.

The Gulf Island National Park sits between the development of Vancouver Island and British Columbia.

Paid programming.

A unique tour of Berlin hunts for little-known stories hidden in the city's famous landmarks, obscure sites, and even in the food.

An unprecedented consumer boom with children being marketed by television directly in their living rooms.

The early years of Cleopatra's life, during which she survives her upbringing in an incestuous, murderous family and goes on to forge a romantic and political alliance with Julius Caesar.

Showing how family favorites such as frozen pizza, pasta, baked beans, and mayonnaise are mass-produced in food factories across Europe.

An unprecedented consumer boom with children being marketed by television directly in their living rooms.

The early years of Cleopatra's life, during which she survives her upbringing in an incestuous, murderous family and goes on to forge a romantic and political alliance with Julius Caesar.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.