When did Underground Marvels Season 2 Episode 7 air?
Underground Marvels Season 2 Episode 7 aired on September 16, 2021.


Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.

An unprecedented landslide unveils a hidden world beneath a picturesque town in northern Italy, and now experts investigate this vast network of tunnels and passageways that stretch 300 feet underground to reveal the city's subterranean past.
Direct answers for episode-level questions and details.
Underground Marvels Season 2 Episode 7 aired on September 16, 2021.
This episode runs for approximately 45 minutes.
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