Smithsonian Channel

On inadequate foundations, San Francisco's MoMA triples in size creating an exterior light enough to prevent collapse; a 1970s Sydney skyscraper is recycled into a 21st century tower; in Dallas, a five-acre park is created.

Mike Davidson embarks with the team to one of the most extreme, avalanche-prone ski mountains in the world: Snowbird; they battle to keep the steep and deep slopes safe with shovels, snowcats and even a WWII Howitzer.

A dusty exhibit from an oddities museum in Niagara Falls could be a genuine long-lost pharaoh from Egypt's most iconic dynasty; a team of experts reexamines the evidence to reveal how a legendary king ended up on the other side of the world.

Dr. Michael Scott uses the latest 3D-scanning technology to reveal the historical secrets of Cairo and Ancient Egypt; he explores the first pyramid ever built at Saqqara and finds out how it helped inspire the Great Pyramid of Giza.

Deploy futuristic lidar technology to map the Amber Road, an ancient trade network linking the Baltic Sea to the Mediterranean. Follow researchers as they retrace the route and reshape our understanding of historical trade and cultural exchange.

The discovery of 51 strangely shaped skulls at a 1,600-year-old Hungarian gravesite is changing the narrative of the decline of the Roman Empire.

Shedding light on the origins of organized warfare and the brutality it left behind; hunting for the beginnings of organized combat in Germany; finding evidence of Roman power in Denmark, and pondering the symbolic role of elite fighters.

Experience the deep distrust and aggression that pushes the world closer to nuclear war; follow a Soviet incursion into the territorial waters of Sweden and Finland and see how northern nations prepare for a battle that is only a button-push away.

The true story of the F-14 Tomcat, the military aircraft made famous in "Top Gun"; how it served as the US Navy's top carrier fighter for a generation.

Exploring the many battles fought out on the banks of the Rhine in 1944 and the secrets behind the lines of the battleground.

Experience the deep distrust and aggression that pushes the world closer to nuclear war; follow a Soviet incursion into the territorial waters of Sweden and Finland and see how northern nations prepare for a battle that is only a button-push away.

The true story of the F-14 Tomcat, the military aircraft made famous in "Top Gun"; how it served as the US Navy's top carrier fighter for a generation.

Exploring the many battles fought out on the banks of the Rhine in 1944 and the secrets behind the lines of the battleground.

Experience the deep distrust and aggression that pushes the world closer to nuclear war; follow a Soviet incursion into the territorial waters of Sweden and Finland and see how northern nations prepare for a battle that is only a button-push away.

The true story of the F-14 Tomcat, the military aircraft made famous in "Top Gun"; how it served as the US Navy's top carrier fighter for a generation.

On inadequate foundations, San Francisco's MoMA triples in size creating an exterior light enough to prevent collapse; a 1970s Sydney skyscraper is recycled into a 21st century tower; in Dallas, a five-acre park is created.

Mike Davidson embarks with the team to one of the most extreme, avalanche-prone ski mountains in the world: Snowbird; they battle to keep the steep and deep slopes safe with shovels, snowcats and even a WWII Howitzer.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Traipsing along ancient pathways crisscrossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

Crews work around the clock to build the world's largest underwater concrete bed to salvage the Costa Concordia; operating in secrecy, teams work under high security to repair one of the world's most iconic cruise liners.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Traipsing along ancient pathways crisscrossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

Crews work around the clock to build the world's largest underwater concrete bed to salvage the Costa Concordia; operating in secrecy, teams work under high security to repair one of the world's most iconic cruise liners.

Germany's selection of strange bedfellows in the form of despots and dictators comes back to haunt them.

As German resources began to run thin as the War progressed, Hitler and Goebbels promoted Wonder Weapons as a way to pave a new path towards victory.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

The Nazis appeared to work together from a distance, but behind the scenes it was different with nepotism, corruption and fear running rampant.

In pursuit of their Aryan dream, the Nazis were encumbered by an ideological war from within that would undermine their ability to succeed in World War II.

Experience the deep distrust and aggression that pushes the world closer to nuclear war; follow a Soviet incursion into the territorial waters of Sweden and Finland and see how northern nations prepare for a battle that is only a button-push away.

The true story of the F-14 Tomcat, the military aircraft made famous in "Top Gun"; how it served as the US Navy's top carrier fighter for a generation.

Exploring the many battles fought out on the banks of the Rhine in 1944 and the secrets behind the lines of the battleground.

Months after the Pearl Harbor attack, shock waves reverberate in every corner of the Pacific; Americans deploy to stem the enemy's advance; after culture clashes, Allied forces later bond over efforts to thwart Japan's move to control New Guinea.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

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.

Months after the Pearl Harbor attack, shock waves reverberate in every corner of the Pacific; Americans deploy to stem the enemy's advance; after culture clashes, Allied forces later bond over efforts to thwart Japan's move to control New Guinea.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

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.

Months after the Pearl Harbor attack, shock waves reverberate in every corner of the Pacific; Americans deploy to stem the enemy's advance; after culture clashes, Allied forces later bond over efforts to thwart Japan's move to control New Guinea.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

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.

Crews work around the clock to build the world's largest underwater concrete bed to salvage the Costa Concordia; operating in secrecy, teams work under high security to repair one of the world's most iconic cruise liners.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

Salvaging a 50-foot motor yacht in Islamorada, Fla.; a 44-foot launch hung up on a dam on the Mississippi River; repairing a major storm gate in the British Isles.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

Salvaging a 50-foot motor yacht in Islamorada, Fla.; a 44-foot launch hung up on a dam on the Mississippi River; repairing a major storm gate in the British Isles.

First-hand accounts, recreations and expert interviews of the battle of Dunkirk, and how soldiers were trapped on the French beach by German forces.

First-hand accounts, re-creations and expert interviews of D-Day in 1944, where the Allied Forces of Britain, America, Canada and France attacked German forces on the coast of Normandy, France.

The Japanese attack on Pearl Harbor triggers the U.S. entering WWII; we reveal the secret stories behind the battle such as that of Dorie Miller.

There are many stories behind the 1940 Battle of Britain, like pilot Bill Millington who sacrifices himself to save civilians.

The tales behind the Blitz; the employment of German speaking radio controllers to confuse Luftwaffe pilots; the French spy who helped the RAF.

Months after the Pearl Harbor attack, shock waves reverberate in every corner of the Pacific; Americans deploy to stem the enemy's advance; after culture clashes, Allied forces later bond over efforts to thwart Japan's move to control New Guinea.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

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.

NASA's 3D-printed Mars habitat rehearses human life on the red planet. Seoul's historic city hall gains a 13-story glass wave. And in Dallas, 68,000 square feet of concrete galleries balance on legs that want to splay open under.

In Philadelphia, Mike is on streets, in tunnels, on tracks and in trolley restoration garages; he is working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly and on time.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

NASA's 3D-printed Mars habitat rehearses human life on the red planet. Seoul's historic city hall gains a 13-story glass wave. And in Dallas, 68,000 square feet of concrete galleries balance on legs that want to splay open under.

In Philadelphia, Mike is on streets, in tunnels, on tracks and in trolley restoration garages; he is working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly and on time.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

NASA's 3D-printed Mars habitat rehearses human life on the red planet. Seoul's historic city hall gains a 13-story glass wave. And in Dallas, 68,000 square feet of concrete galleries balance on legs that want to splay open under.

In Philadelphia, Mike is on streets, in tunnels, on tracks and in trolley restoration garages; he is working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly and on time.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

Jeremy Birch takes on a salvage to raise a vessel with a concrete hull; it's been in the Fraser River for a month, collecting silt and mud, adding 30 tons to its deadweight.

Meandering through the black waters of a primordial river immortalized in a folk song.

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

Chris Ward sets out with Josh Moreira and Ward's younger brother to salvage a light aircraft that's sitting on the seabed; Jeremy Birch braves the arctic conditions to salvage two vessels that have fallen prey to the crushing ice conditions.

Meandering through the black waters of a primordial river immortalized in a folk song.

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

Chris Ward sets out with Josh Moreira and Ward's younger brother to salvage a light aircraft that's sitting on the seabed; Jeremy Birch braves the arctic conditions to salvage two vessels that have fallen prey to the crushing ice conditions.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built are revealed.

Mike Davidson goes to the biggest automated package sorting facility in the world, UPS Worldport in Louisville, Kentucky; two million packages go through here every day.

The massive AC-130 provides unparalleled close air support to U.S. and allied ground troops.

The brief but historic service of the Grumman F6F Hellcat and its instrumental role in winning the Pacific War.

The inside story of the F-4 Phantom, the U.S. military's go-to fighter for more than four decades.

The inside story of the ultimate stealth fighter, the F-22 Raptor, and its predecessors.

In Philadelphia, Mike is on streets, in tunnels, on tracks and in trolley restoration garages; he is working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly and on time.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

Get to know the Supermarine Spitfire, which changed the fate of an entire nation in 1940; explore this legendary fighter's superior engineering and see how its revolutionary elliptical wings helped it emerge victorious in the Battle of Britain.

Race to resupply farmers after Mount Spurr starts to rumble; the Anchorage International operations team handles two emergency landings; answering the call when a family asks for help getting to a vital school basketball game.

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

Get to know the Supermarine Spitfire, which changed the fate of an entire nation in 1940; explore this legendary fighter's superior engineering and see how its revolutionary elliptical wings helped it emerge victorious in the Battle of Britain.

Race to resupply farmers after Mount Spurr starts to rumble; the Anchorage International operations team handles two emergency landings; answering the call when a family asks for help getting to a vital school basketball game.

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

Get to know the Supermarine Spitfire, which changed the fate of an entire nation in 1940; explore this legendary fighter's superior engineering and see how its revolutionary elliptical wings helped it emerge victorious in the Battle of Britain.

Race to resupply farmers after Mount Spurr starts to rumble; the Anchorage International operations team handles two emergency landings; answering the call when a family asks for help getting to a vital school basketball game.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built are revealed.

Mike Davidson goes to the biggest automated package sorting facility in the world, UPS Worldport in Louisville, Kentucky; two million packages go through here every day.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

Bundles of cedar wood tree trunks are smashed apart, releasing thousands of logs on the shoreline; Jeremy and his crew must work fast to recover the cargo.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

Bundles of cedar wood tree trunks are smashed apart, releasing thousands of logs on the shoreline; Jeremy and his crew must work fast to recover the cargo.

Exploring behind-the-scenes of design and construction of revolutionary buildings in Spain, New York and a university campus in Florida.

In Philadelphia, Mike is on streets, in tunnels, on tracks and in trolley restoration garages; he is working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly and on time.

Germany's selection of strange bedfellows in the form of despots and dictators comes back to haunt them.

As German resources began to run thin as the War progressed, Hitler and Goebbels promoted Wonder Weapons as a way to pave a new path towards victory.

How Hitler's heavy narcotic use played a role in his murderous regime, as well as fueled an already delusional character.

The Nazis appeared to work together from a distance, but behind the scenes it was different with nepotism, corruption and fear running rampant.

Race to resupply farmers after Mount Spurr starts to rumble; the Anchorage International operations team handles two emergency landings; answering the call when a family asks for help getting to a vital school basketball game.

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

A look at the U.S. clandestine intelligence team of the 1980s called FOG (Field Operations Group) and how it paved the way for today's special ops forces.

Take a deeper look at the Aztec religion and ritual human sacrifice. Tap into the profound spiritual logic that led priests to offer blood and human hearts in exchange for protection from the gods, who could destroy the universe at any moment.

Dictators may appear omnipotent, but their position depends largely on a network of individuals who benefit from their rule, and their support does not come cheap.

A look at the U.S. clandestine intelligence team of the 1980s called FOG (Field Operations Group) and how it paved the way for today's special ops forces.

Take a deeper look at the Aztec religion and ritual human sacrifice. Tap into the profound spiritual logic that led priests to offer blood and human hearts in exchange for protection from the gods, who could destroy the universe at any moment.