The most beautiful cave in Greece and one of the most impressive in the world. It is located on the west coast of the Laconian Peninsula, in the Inlet of Diros. By 1960, just 1.600 meters had been explored and mapped while today the known length of the cave is over 15 kilometers! During the 70s the first underwater exploration took place. The length of the cave corridors that are accessible is 3.100 meters. The guided tour is made by boats.