Secrets of the Underground

Scientist Rob Nelson investigates the strangest underground locations in the world, using the latest technology and research to shed new light on the secrets that lie just beneath our feet.

Part tech, part mystery, and part science, this show is What on Earth? meets Mysteries at the Museum -- and it's all underground. Using LIDAR, ground-penetrating radar, and all types of 3D imaging, we tell the stories of some of the strangest subterranean locations in the country. From intricate (and forgotten) sewers, caves, chemical labs, and dark matter detectors, to lost civilizations, these images look at all things covert, hidden, and unfamiliar.

Show Info

Network: United States Science (2017 - now)
Schedule: Saturdays at 22:00 (60 min)
Status: Running
Show Type: Documentary
Genres: Mystery History
Episodes ordered: 8 episodes

Official site:

7.6 (8 votes)

Previous Episode

Quest for the Gold Rush Fortune

Episode 2x08; Dec 16, 2017

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.

Previous Episodes

Episode NameAirdateTrailer
2x08: Quest for the Gold Rush FortuneDec 16, 2017
2x07: Lost Pirate City TreasureDec 9, 2017
2x06: Mystery of the Ice CaveDec 2, 2017
View full episode list »