Scientist Rob Nelson investigates the strangest underground locations in the world. He uses the latest technology and research to shed new light on the secrets that lie just beneath our feet.
Rob Nelson heads to California to investigate a network of major fault lines that could set off a massive earthquake. Also, a mysterious sinkhole is explored that some believe is a portal to the center of the Earth.
Rob Nelson investigates a cluster of ancient ruins that suggest Europeans arrived in North America almost 1,000 years before Columbus. Also, a dormant supervolcano may be showing new signs of life.
Rob Nelson descends into a Texas cave to uncover ancient remains of an unknown, mass extinction. Also, a phenomenon that's caused ships to disappear for centuries in the placid waters of Lake Michigan is investigated.
A trove of stolen Nazi treasure is rumored to be hidden, buried deep inside a remote mountain fortress in Poland. Using cutting edge technology, Rob Nelson explores deep in abandoned Nazi tunnels in search for the infamous riches.
Rob Nelson and Stefan Burns use the latest technology to search for the fabled lost temple treasures of Jerusalem. Then they scour the Israeli desert for evidence of King Solomon's mines.
Rob Nelson and Stefan Burns dive into Detroit's river of Prohibition secrets. Then they head to Long Island, NY, to investigate the ground beneath Nikola Tesla's only surviving lab to find clues about the enigmatic scientist's final invention.
Rob Nelson and Stefan Burns travel to Jamaica to go on a high-tech treasure hunt for the lost fortune of the legendary pirate Henry Morgan.
Rob Nelson and Stefan Burns investigate disturbing new evidence that a massive supervolcano beneath Naples, Italy, may be on the verge of erupting again.
Rob Nelson and Stefan Burns investigate a radical new theory that claims the legendary sunken city of Atlantis was actually located in North America.
Rob Nelson and Stefan Burns investigate a centuries-old murder case in Jamaica. Then they search for a fabled fortune deep in the northern California woods.
Rob Nelson investigates rumors of a secret, underground escape route used by the infamous gangster Al Capone in Louisville, KY. Also, the Mima mounds in Washington State are explored.
Rob Nelson examines a set of bizarre markings on a Colorado ridge that suggest a violent clash between prehistoric beasts. Also, an ancient California lake is investigated to see if it's home to alien life.
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.