Mysteries of the Abandoned · SEASON 4
Labyrinth of the Dead
Episode 4 · 2019-04-25

- Documentary
Episode overview
Tunnels filled with human bones lie beneath the streets of Paris, and this horrifying engineering marvel points to a dark secret; new discoveries reveal why this grisly underground death maze was built and why it was abandoned.
45 minutes
Season 4 episodes
1. World's Strangest Ghost Towns2019-04-04
2. Secret of Supervillain Island2019-04-11
3. Escobar's Castle2019-04-18
4. Labyrinth of the Dead2019-04-25
5. Treasure of Outlaw Valley2019-05-02
6. Alaska's Fort Apocalypse2019-05-09
7. Alien Hell Portal2019-05-16
8. Pompeii's Gate To Hell2019-05-23
9. Haunting on Plague Island2019-05-30