Mysteries of the Abandoned Season 4 Episode 4 - Labyrinth of the Dead

Airdate: 2019-Apr-25

Episode summary:

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.

About Mysteries of the Abandoned series:

Some of the world's most incredible engineering projects now lie in ruins. These deserted places are home to extraordinary mysteries and untol...Show more >