The Unexplored Tunnels Of The Odessa Catacombs
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Key Facts In This Video
Underneath the city of Odessa, Ukraine is the largest catacomb system in the world. 00:13
Every year, a catacomb exploration group performs a huge mapping expedition of the Odessa catacombs. 01:00
Because people directly channel their sewage into the Odessa catacombs, they may eventually take down the whole city. 01:54
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