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Underground Marvels Season 2 Episodes Guide and Summaries

EpisodeEpisode NameAir Date
1Hotel Bunker of the Apocalypse
2Mystery of the Kentucky Cave
3Cincinnati's Secret Caverns
4Buried Lab of the Black Hills
5Ireland's Underground Alcatraz
6Subterranean Silo Survival
7Italy's Subterranean Secret
8Grand Canyons Lost Treasure
9Murder Raid Tunnels
10Medieval Maze of Secrets