Underground Marvels

1 Secrets of the Rock 2019-10-17 2 Mystery of the Lost Labyrinth 2019-10-24 3 Secrets of the Terror Tunnels 2019-10-31 4 The Renegade's Lair 2019-11-07 5 Cave of the Body Snatchers 2019-11-14 6 World's Biggest Labyrinth 2019-11-21 7 Treasures of the Lost Mine 2019-12-05 8 Ghosts of the Hell Maze 2019-12-12 9 Conspiracy in the Buried City 2019-12-19 10 Curse of Cannibal Caves 2019-12-26

1 Hotel Bunker of the Apocalypse 2021-08-05 2 Mystery of the Kentucky Cave 2021-08-12 3 Cincinnati's Secret Caverns 2021-08-19 4 Buried Lab of the Black Hills 2021-08-26 5 Ireland's Underground Alcatraz 2021-09-02 6 Subterranean Silo Survival 2021-09-09 7 Italy's Subterranean Secret 2021-09-16 8 Grand Canyon's Lost Treasure 2021-09-23 9 Murder Raid Tunnels 2021-09-30 10 Medieval Maze of Secrets 2021-10-07