Smithsonian Channel

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.

Explore Earth's most powerful and dangerous volcanoes.

Witnessing amazing buildings, bridges, lifts and other structures that pushed structural concrete engineering to the edge.

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.

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.

Capt. John Ward and his crew are called to raise a sunken houseboat near Pensacola, Fla.; the owner of the boat wants it back, but the current occupiers of the boat living in it don't want John's services; there've been reports of gunfire too.

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.

John Ward and his crew are called to salvage a massive barge upturned by a storm in a canal; Hickory Scuba Divers work to salvage a valuable sailboat that's sunk at its mooring.

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.

John Ward and his crew are called to salvage a massive barge upturned by a storm in a canal; Hickory Scuba Divers work to salvage a valuable sailboat that's sunk at its mooring.

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 heads to Brazil, where an offshore crew is racing the clock to set up giant power ships to deliver electricity to a country in desperate need.

Witnessing amazing buildings, bridges, lifts and other structures that pushed structural concrete engineering to the edge.

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.

Explore Earth's most powerful and dangerous volcanoes.

Witnessing amazing buildings, bridges, lifts and other structures that pushed structural concrete engineering to the edge.

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.

Explore Earth's most powerful and dangerous volcanoes.

During World War II, the B-17 became a formidable fortress of the skies; uncover the technological and strategic innovations that made the B-17 a key to D-Day success, and later, Allied victory.

Valentine's Day delays loom when a squadron of F-22 makes an unexpected landing; high winds threaten a helicopter's 600-lb sling load; Aviators come to the rescue of a village without water.

Southern Mexico stretches from Yucatán's crystal-clear cenotes to the fertile land of the Oaxaca Valley; Maya and Zapotec traditions live through gastronomy and art; history is ever present in ancient pyramids and architecture.

During World War II, the B-17 became a formidable fortress of the skies; uncover the technological and strategic innovations that made the B-17 a key to D-Day success, and later, Allied victory.

Valentine's Day delays loom when a squadron of F-22 makes an unexpected landing; high winds threaten a helicopter's 600-lb sling load; Aviators come to the rescue of a village without water.

Southern Mexico stretches from Yucatán's crystal-clear cenotes to the fertile land of the Oaxaca Valley; Maya and Zapotec traditions live through gastronomy and art; history is ever present in ancient pyramids and architecture.

During World War II, the B-17 became a formidable fortress of the skies; uncover the technological and strategic innovations that made the B-17 a key to D-Day success, and later, Allied victory.

Valentine's Day delays loom when a squadron of F-22 makes an unexpected landing; high winds threaten a helicopter's 600-lb sling load; Aviators come to the rescue of a village without water.

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 heads to Brazil, where an offshore crew is racing the clock to set up giant power ships to deliver electricity to a country in desperate need.

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.

Salvor and treasure seeker Phil Risko sets out to retrieve valuable 80-year-old hardwood logs from the bottom of the sea; a multi-million dollar cruise vessel undergoes emergency repairs in Panama.

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.

Salvor and treasure seeker Phil Risko sets out to retrieve valuable 80-year-old hardwood logs from the bottom of the sea; a multi-million dollar cruise vessel undergoes emergency repairs in Panama.

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

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.

Unravel the myth of the elusive Walbrzych Gold Train deep in the Polish wilderness; evaluate shifting claims and bizarre artifacts presented by an eccentric local guide, then confront the absurdity and obsession that fuel this famed treasure hunt.

Valentine's Day delays loom when a squadron of F-22 makes an unexpected landing; high winds threaten a helicopter's 600-lb sling load; Aviators come to the rescue of a village without water.

Southern Mexico stretches from Yucatán's crystal-clear cenotes to the fertile land of the Oaxaca Valley; Maya and Zapotec traditions live through gastronomy and art; history is ever present in ancient pyramids and architecture.

During World War II, the B-17 became a formidable fortress of the skies; uncover the technological and strategic innovations that made the B-17 a key to D-Day success, and later, Allied victory.

Valentine's Day delays loom when a squadron of F-22 makes an unexpected landing; high winds threaten a helicopter's 600-lb sling load; Aviators come to the rescue of a village without water.

Southern Mexico stretches from Yucatán's crystal-clear cenotes to the fertile land of the Oaxaca Valley; Maya and Zapotec traditions live through gastronomy and art; history is ever present in ancient pyramids and architecture.

A member of the Osage Nation investigates the series of murders and unexplained deaths that struck the oil-rich tribe in the 1920s.

In less than 200 years, the Aztecs rose from nomadic origins to build the powerful empire of Tenochtitlan. Combining archaeology and stunning 3D reconstructions, this series reveals the rise and fall of a remarkable civilization.

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 member of the Osage Nation investigates the series of murders and unexplained deaths that struck the oil-rich tribe in the 1920s.

In less than 200 years, the Aztecs rose from nomadic origins to build the powerful empire of Tenochtitlan. Combining archaeology and stunning 3D reconstructions, this series reveals the rise and fall of a remarkable civilization.