Season 1 Episode 8
Underground Marvels
TV-PGDocumentarySeason 110 Episodes
Secrets of the RockS1 E1A hidden, subterranean city built within the Rock of Gibraltar is an immense fortress to control the seas during World War II; new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.
Mystery of the Lost LabyrinthS1 E2A strange, centuries-old labyrinth built into an abandoned quarry was built by an eccentric millionaire, and no one knows why; but now, a new excavation into this mysterious 9,000-foot tunnel system might finally reveal its dark secrets.
Secrets of the Terror TunnelsS1 E3A vast system of tunnels built almost 3,000 years ago was the site of the greatest battles of antiquity, and these disorienting passages could be the deadliest weapon in war; experts reveal what made this underground world so terrifying.
The Renegade's LairS1 E4A strange underground system known as the Black Cave is connected to a fairytale castle and was home to an infamous nobleman on the run from the law; experts investigate the secrets he left here to discover new parts of this mysterious network.
Cave of the Body SnatchersS1 E5Eerie system of underground vaults in Scotland was once hideout for thieves who stole newly-buried bodies and sold them; experts excavate these rubble-filled caves to reveal the secrets of what these bandits left behind.
World's Biggest LabyrinthS1 E6The world's biggest labyrinth is a 1,553-mile cave system that's home to some of history's darkest mysteries, and new discoveries at this strange place reveal the long-lost secrets of Nazi occupation, Soviet revolution, and Cold War subterfuge.
Treasures of the Lost MineS1 E7Caverns hidden deep inside a remote mountain are home to a precious mineral found nowhere else on Earth; experts and treasure hunters use cutting-edge technology to follow rumors of a mysterious long-lost mine in search of a payday.
Ghosts of the Hell MazeS1 E8A labyrinth of vast tunnels in the French countryside has served as a secret hideout during wartime for centuries, and on its walls, experts have discovered the final confessions of soldiers who fought during one of the deadliest days of World War I.
Conspiracy in the Buried CityS1 E9A buried ancient city hidden five-stories underground can house 3,000 people in secret; experts use the latest tech to reveal the truth behind this strange place.
Curse of Cannibal CavesS1 E10A mysterious cave system is home to some of the oldest human remains ever discovered, and today, the explorers and researchers investigating this site are uncovering shocking evidence of cannibalism among its Ice Age denizens.
Ghosts of the Hell MazeSeason 1 Episode 8
Cast
Jamie EffrosRating
TV-PG
Genres
DocumentaryMore Like This
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