When did Underground Marvels Season 1 Episode 3 air?
Underground Marvels Season 1 Episode 3 aired on October 31, 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 3
Secrets of the Terror Tunnels
Oct 31, 2019·45m
A vast system of tunnels built almost three thousand 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.
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Direct answers for episode-level questions and details.
How long is Underground Marvels Season 1 Episode 3?
This episode runs for approximately 45 minutes.
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