Season 2 poster

Season 2

10 episodes January 10, 2022

Episodes

1 Murder Raid Tunnels Jan 10, 2022 No ratings 2 Grand Canyon's Lost Treasure Jan 17, 2022 No ratings 3 Cincinnati's Secret Caverns Jan 24, 2022 No ratings 4 Hotel Bunker of the Apocalypse Jan 31, 2022 No ratings 5 Mystery of the Kentucky Cave Feb 7, 2022 No ratings 6 Ireland's Underground Alcatraz Feb 14, 2022 No ratings 7 Medieval Maze of Secrets Feb 21, 2022 No ratings 8 Buried Lab of the Black Hills Feb 28, 2022 No ratings 9 Subterranean Silo Survival Mar 7, 2022 No ratings 10 Italy's Subterranean Secret Mar 14, 2022 No ratings