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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.

Science
2 Seasons, 17 Episodes
February 11, 2017
Reality
6.5/10
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Secrets of the Underground Full Episode Guide

  • Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California; the search for the legendary treasure.

  • When an infamous pirate city sunk into the sea after a massive earthquake, a wealthy pirate's treasure may have disappeared with it; a hunt for the legendary lost pirate treasure of Henry Morgan.

  • A strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.

  • New theories claim that the legendary sunken city of Atlantis could have actually been in the Americas; Rob Nelson and Stefan Burns investigate evidence that might shed more light on one of the world's greatest mysteries.

  • 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.

  • Nikola Tesla died before he finished a mysterious invention, but the ground beneath his only remaining lab might hold clues; Rob Nelson and Stefan Burns are the first to use cutting-edge tech to investigate Tesla's underground secrets.

  • Priceless gold and silver artifacts are believed to be in fabled lost Temple Treasures of Jerusalem and King Solomon's hidden mines; with unprecedented access, Rob Nelson and Stefan Burns use the latest technology to search for the legendary treasure.

  • 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 earth's surface and in abandoned Nazi tunnels in search for the infamous legend.

  • Rob Nelson investigates investigates a cluster of 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.

  • Near San Francisco a minefield of fault lines intersect deep underground. And new evidence suggests they could all combine forces to unleash an unprecedented mega-quake. Is there a ticking time bomb beneath California? We'll set off a series of seismic explosives to find out. And in Oregon, near the rugged cape Perpetua coast, lies a mystifying sight: a sinkhole nicknamed "Thor's well" that doesn't sound, look or act like any other sinkholes on the planet. Because while water continuously gushes into Thor's Well, it never seems to fill up. Some claim it's an endless pit that drops to the center of the earth. Others believe it leads to an elaborate network of subterranean caves. But whatever it is it seems to be draining the Pacific Ocean.

  • Descending into a cave 30 feet beneath Texas in search of evidence of a mass extinction event; heading to Lake Michigan to investigate an unexplained, Bermuda Triangle-like phenomenon that has caused ships to disappear for centuries.

  • Examining a set of bizarre markings that suggest a violent clash between prehistoric beasts; in California, Rob investigates to see if a strange lake is a home to alien life.

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

  • Exploring mysterious tunnels beneath Denver's airport, capitol building and downtown to investigate rumors of a secret organization that operates below; in Ohio, trying to uncover the ancient secrets of a giant mound shaped like a serpent.

  • Investigating rumors of a secret underground escape route used by the infamous gangster Al Capone; trying to uncover who or what built a vast landscape of earthen mounds in Washington state.

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