—A fascinating new world has emerged for scientists to study, and it's just beneath their feet. With the emergence of cutting-edge technologies such as ground penetrating radar, LIDAR (Light Detection and Ranging), and 3-D imaging, scientists are now able to research underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into the past. In "Secrets of the Underground," Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena. Nelson looks at all things hidden, covert and unfamiliar, from intricate and forgotten sewers and caves to lost civilizations and structures.

2 seasonsReality, DocumentaryTV-PG

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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 of the infamous legend.
Upcoming
A strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.
Upcoming
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.
Upcoming
Searching for the fabled lost Temple Treasures of Jerusalem and King Solomon's hidden mines.
Upcoming
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.
Upcoming
New theories claim that the legendary sunken city of Atlantis actually could have been in the Americas; Rob Nelson and Stefan Burns investigate evidence that might shed more light on one of the world's greatest mysteries.
Upcoming

Season 28 of 8 Episodes

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 of the infamous legend.
Searching for the fabled lost Temple Treasures of Jerusalem and King Solomon's hidden mines.
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.
A massive supervolcano beneath Naples, Italy, may be on the verge of erupting again, which could have apocalyptic consequences for the planet; Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.
New theories claim that the legendary sunken city of Atlantis actually could have 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 strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.
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.
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.

A fascinating new world has emerged for scientists to study, and it's just beneath their feet. With the emergence of cutting-edge technologies such as ground penetrating radar, LIDAR (Light Detection and Ranging), and 3-D imaging, scientists are now able to research underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into the past. In "Secrets of the Underground," Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena. Nelson looks at all things hidden, covert and unfamiliar, from intricate and forgotten sewers and caves to lost civilizations and structures.

Rob Nelson, Tim Bechtel, Jared Peacock, Valerie Heest

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Secrets of the Underground

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8 episodes will be broadcast over the next two weeks

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