Is one of the most famous unexplored caves in Greece. It is located on the northeast side of the island close to the sea. The visitor can see the cave doing with our boats a tour around the island. There is not access in the area by land , until now, but only one dangerous small path that some locals know. Note that if there are strong winds neither the boat can approach in the region. On the walls of the cave were found inscribed ancient names dating back to the 4th century. The young men that visited the island , they came for a ceremony of majority. In the cave, also, have found bones and objects that have been linked to legends who described the cave as a hideout of the island's inhabitants in cases of pirate attacks. The cave has been researched over a length of 300 metres and then the cave is divided into small chambers that largely have not researched so the actual length of the cave remains unknown.