Visit the mysterious underground world of odessa catacombs on a 25 hour private guided tour the labyrinths of the catacombs are spread for about 1550 miles 2500 km under the city of odessa and its surroundings many pages of odessas history are connected with the catacombs it used to be limestone quarries a place where the smugglers sold their goods and a hiding place during the world war ii nowadays it is a famous attraction and no visit to odessa is complete without this tour