When did Underground Marvels Season 1 Episode 8 air?
Underground Marvels Season 1 Episode 8 aired on December 12, 2019.
Underground Marvels
Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.
Season 1 · Episode 8
Ghosts of the Hell Maze
Dec 12, 2019·45m
A labyrinth of tunnels in the French countryside has served as a secret hideout during wartime for centuries. On its walls, experts have discovered the final confessions of soldiers who fought here during one of the deadliest days of World War I.
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Direct answers for episode-level questions and details.
How long is Underground Marvels Season 1 Episode 8?
This episode runs for approximately 45 minutes.
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