Secrets of the Underground

Using cutting-edge technologies such as ground penetrating radar (GPR), LIDAR (Light Detection and Ranging), and 3-D imaging, scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into our history.

2017 HD 60min TV-PG United States English

Documentary

S1E1 - Capone's Escape Tunnels 2017-02-14

Rob Nelson investigates rumors of a secret underground escape route used by the infamous gangster Al Capone. In Washington state, Rob tries to uncover who -- or what -- built a vast landscape of earthen mounds in Washington state.

S1E2 - Mystery of the Serpent Mound 2017-02-21

Rob Nelson explores mysterious tunnels beneath Denvers airport and capitol building to investigate rumors of a secret organization operating below. In Ohio, he tries to uncover the ancient secrets of a mound shaped like a serpent.

S1E3 - America's Buried Massacre 2017-02-28

Rob Nelson hunts for a legendary mass grave that could expose a dark secret of Americas industrial past. High in the mountains, a giant lake is mysteriously disappearing, and Rob uses cutting-edge technology to find out why.

S1E4 - Rocky Mountain Monsters 2017-03-07

Rob Nelson examines a set of bizarre markings that suggest a violent clash between prehistoric beasts. In California, he investigates if a strange lake is a home to alien life.

S1E5 - Great Lakes Bermuda Triangle 2017-03-14

Rob descends into a cave 30 feet beneath Texas in search of evidence of a mass extinction event. Then, he heads to Lake Michigan to investigate a Bermuda Triangle-like phenomenon that has caused ships to vanish for centuries.

S1E6 - California's Hidden Doomsday 2017-03-21

Rob Nelson heads to California to investigate a network for major fault lines that could set off an unprecedented mega-quake. Then, he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.

S1E7 - Secret History of the New World 2017-03-28

Rob investigates ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus. Then, he heads to California where a dormant super-volcano may be showing new signs of life.

S1E8 - American Stonehenge 2017-04-04

Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge. At the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.

S2E1 - Legend of the Nazi Gold 2017-10-28

A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Using cutting-edge technology, Rob Nelson and Stefan Burns explore deep underneath the earths surface and in abandoned Nazi tunnels in search for the infamous legend.

S2E2 - King Solomon's Treasures 2017-11-04

Priceless gold and silver artifacts are believed to be in fabled lost Temple Treasures of Jerusalem & King Solomons hidden mines. With unprecedented access, Rob Nelson and Stefan Burns use the latest technology to search for the legendary treasure.

S2E3 - Tesla's Final Secrets 2017-11-11

Nikola Tesla died before finishing a mysterious, earth-shattering invention, but the ground beneath his only remaining lab might hold clues. Rob Nelson & Stefan Burns are the first to use cutting-edge tech to investigate Teslas underground secrets.

S2E4 - Doomsday Volcano of the Gods 2017-11-18

A massive supervolcano beneath Naples, Italy may be on the verge of erupting again, which could have apocalyptic consequences across the planet. Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.

S2E5 - Atlantis in America 2017-11-25

New theories claim that the legendary sunken city of Atlantis could have actually been in the Americas. Rob Nelson & Stefan Burns use cutting-edge technology to investigate evidence that might shed more light on one of the worlds greatest mysteries.

S2E6 - Mystery of the Ice Cave 2017-12-02

A strange cave freezes in the summer and melts in the winter, and a massive sand dune swallows a small child in an instant. Rob Nelson and Stefan Burns use cutting-edge technology to investigate these mysteries of the natural world.

S2E7 - Lost Pirate City Treasure 2017-12-09

When an infamous pirate city sunk into the sea after a massive earthquake, a pirates treasure might have disappeared with it. Rob Nelson and Stefan Burns use cutting-edge technology to hunt for the legendary lost pirate treasure of Henry Morgan.

S2E8 - Quest for the Gold Rush Fortune 2017-12-16

Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California. Rob Nelson and Stefan Burns use cutting-edge technology to search for the legendary treasure.

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