Seasons and episodes
1Season 1 Oct. 17, 2019
1 - 1Secrets of the Rock Oct. 17, 2019
1 - 2Mystery of the Lost Labyrinth Oct. 24, 2019
1 - 3Secrets of the Terror Tunnels Oct. 31, 2019
1 - 4The Renegade's Lair Nov. 07, 2019
1 - 5Cave of the Body Snatchers Nov. 14, 2019
1 - 6World's Biggest Labyrinth Nov. 21, 2019
1 - 7Treasures of the Lost Mine Dec. 05, 2019
1 - 8Ghosts of the Hell Maze Dec. 12, 2019
1 - 9Conspiracy in the Buried City Dec. 19, 2019
1 - 10Curse of Cannibal Caves Dec. 26, 2019
2Season 2 Aug. 05, 2021
2 - 1Hotel Bunker of the Apocalypse Aug. 05, 2021
2 - 2Mystery of the Kentucky Cave Aug. 12, 2021
2 - 3Cincinnati's Secret Caverns Aug. 19, 2021
2 - 4Buried Lab of the Black Hills Aug. 26, 2021
2 - 5Ireland's Underground Alcatraz Sep. 02, 2021
2 - 6Subterranean Silo Survival Sep. 09, 2021
2 - 7Italy's Subterranean Secret Sep. 16, 2021
2 - 8Grand Canyon's Lost Treasure Sep. 23, 2021
2 - 9Murder Raid Tunnels Sep. 30, 2021
2 - 10Medieval Maze of Secrets Oct. 07, 2021
Synopsis
Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.
Original title Underground Marvels
First air date Oct. 17, 2019
Last air date Oct. 07, 2021
Average Duration 45 minutes
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