🇺🇦World’s Largest Labyrinth! - Odessa Catacombs (2500km)

A Tour of the World’s Largest Labyrinth: The Odessa Catacombs. Stretching to an estimated total length of 2,500km, the Odessa Catacombs are perhaps the largest network of tunnels anywhere in the world. #Odessa #Catacombs #Ukraine