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. Then he explores a mysterious sinkhole on the Oregon coast that some believe is an endless pit to the center of the Earth.
Rob Nelson investigates a cluster of ancient ruins that suggest Europeans arrived in the Americas almost 1,000 years before Columbus. Then he heads to California where a dormant supervolcano may be showing new signs of life.
Rob Nelson descends into a Texas cave to find evidence of a mass extinction event. Then he dives beneath the placid waters of Lake Michigan to investigate a Bermuda Triangle-like phenomenon that's caused ships to disappear for centuries.
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 tunnels for the infamous treasure.
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 travels to Louisville, Kentucky, to investigate rumors of a secret underground escape route used by Al Capone. Then he tries to uncover who -- or what-- built a vast landscape of earthen mounds in Washington state.
Rob Nelson examines a set of bizarre markings on a Colorado ridge that suggest a violent clash between prehistoric beasts. Then he investigates if an ancient California lake is 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.