Many years before modern air travel, the ancient Chinese had learned and were practising the complicated principles of fluid and aerodynamics in the kites they flew, the boats they sailed and the childrens toys they made.

Treasure hunters Rick and Marty are on the trail of Civil War gold allegedly confiscated from Jefferson Davis in 1865. Part of it lies at the bottom of Lake Michigan, another in a warren of tunnels beneath Michigan, and another in a cave in Utah.

The Spear of Destiny passed through the hands of leaders like Napoleon and Adolf Hitler, and there are a number of shadowy institutions around the world that are still chasing the Spear. Decoded tries to solve this centuries-old mystery.

'Ancient astronaut' theorists believe aliens have been visiting earth for thousands of years. If so, might we find evidence of this in the stories of America's Old West?

An alternative world thrives in the shadows of this capital 'city of lights'. Host Eric Geller has special access to this dark underworld, where both the secrets of the living and the sins of the dead are revealed.

Where Did It Come From? travels to Mexicos Yucatan peninsula to get a first hand look at the ancient worlds most skilled astronomers: the Maya.

America has a history of building the impossible. Across the nation, a new generation of impressive projects is underway. On this episode: New Tappan Zee Bridge, Los Angeles Subway, New Orleans pump station, and Mount Rushmore preservation.

Scott gets his hands on a piece of Captain Kidd's treasure, where the trail leads him to an ancient Templar fortress that holds valuable clues. Barry's team discovers a new shipwreck they believe might be a Templar vessel.

Many years before modern air travel, the ancient Chinese had learned and were practising the complicated principles of fluid and aerodynamics in the kites they flew, the boats they sailed and the childrens toys they made.

Treasure hunters Rick and Marty are on the trail of Civil War gold allegedly confiscated from Jefferson Davis in 1865. Part of it lies at the bottom of Lake Michigan, another in a warren of tunnels beneath Michigan, and another in a cave in Utah.

The Spear of Destiny passed through the hands of leaders like Napoleon and Adolf Hitler, and there are a number of shadowy institutions around the world that are still chasing the Spear. Decoded tries to solve this centuries-old mystery.

'Ancient astronaut' theorists believe aliens have been visiting earth for thousands of years. If so, might we find evidence of this in the stories of America's Old West?

An alternative world thrives in the shadows of this capital 'city of lights'. Host Eric Geller has special access to this dark underworld, where both the secrets of the living and the sins of the dead are revealed.

Where Did It Come From? travels to Mexicos Yucatan peninsula to get a first hand look at the ancient worlds most skilled astronomers: the Maya.

America has a history of building the impossible. Across the nation, a new generation of impressive projects is underway. On this episode: New Tappan Zee Bridge, Los Angeles Subway, New Orleans pump station, and Mount Rushmore preservation.

In this series, renowned underwater archaeologist and adventurer Barry Clifford, along with a crack team of on-land explorers and experts, attempts to solve a mystery that dates back hundreds of years.

Zahi is supervising the restoration of the Step Pyramid, the oldest in Egypt, and helping him out are the members of his fellowship programme.

Alex Lagina joins Kevin Dykstra and his team in their quest to find 140 million dollars in Confederate gold they believe is on the bottom of Lake Michigan and on their first day back on the lake, new evidence suggests they may have found it.

Millions of Americans believe in UFOs, but the government vehemently denies any alien encounters, from the Roswell incident to the ultra-secretive military base Area 51. Top military and aviation organizations break their silence on alien life.

Hindu scripture describes an enormous flying creature called Garuda that shook the ground when it landed on Earth. Is it possible that this monster was actually a misinterpreted alien craft?

An explosion in a San Bruno, California destroys homes and kills residents. An experienced captain and crew sail their ship into the path of Hurricane Sandy, leaving many asking why. Was it an engineering failure or human error?

In the 1950s, the tower block was born. But by the 1970s, these cities in the sky became slums. In 2017, missed warnings, vague regulations and corners cut in favour of financial return resulted in the deadliest tower block fire in British history.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

In this series, renowned underwater archaeologist and adventurer Barry Clifford, along with a crack team of on-land explorers and experts, attempts to solve a mystery that dates back hundreds of years.

Zahi is supervising the restoration of the Step Pyramid, the oldest in Egypt, and helping him out are the members of his fellowship programme.

Alex Lagina joins Kevin Dykstra and his team in their quest to find 140 million dollars in Confederate gold they believe is on the bottom of Lake Michigan and on their first day back on the lake, new evidence suggests they may have found it.

Millions of Americans believe in UFOs, but the government vehemently denies any alien encounters, from the Roswell incident to the ultra-secretive military base Area 51. Top military and aviation organizations break their silence on alien life.

Hindu scripture describes an enormous flying creature called Garuda that shook the ground when it landed on Earth. Is it possible that this monster was actually a misinterpreted alien craft?

An explosion in a San Bruno, California destroys homes and kills residents. An experienced captain and crew sail their ship into the path of Hurricane Sandy, leaving many asking why. Was it an engineering failure or human error?

In the 1950s, the tower block was born. But by the 1970s, these cities in the sky became slums. In 2017, missed warnings, vague regulations and corners cut in favour of financial return resulted in the deadliest tower block fire in British history.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

In this series, renowned underwater archaeologist and adventurer Barry Clifford, along with a crack team of on-land explorers and experts, attempts to solve a mystery that dates back hundreds of years.