When did Underground Marvels Season 2 Episode 3 air?
Underground Marvels Season 2 Episode 3 aired on August 19, 2021.
Underground Marvels
Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.
Season 2 · Episode 3
Cincinnati's Secret Caverns
Aug 19, 2021·45m
Deep beneath the streets of Cincinnati lies a network of deserted tunnels and caverns that contain a remarkable history of the city's origins, and now, experts investigate to reveal who built this underground labyrinth and why it was abandoned.
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Direct answers for episode-level questions and details.
How long is Underground Marvels Season 2 Episode 3?
This episode runs for approximately 45 minutes.
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