The cave, discovered during the Second World War, extends for 1km and covers an area of 14 800m; water streams continuously down its walls. The caverns are artistically lit to show off the splendid limestone concretions in the form of stalagmites, stalactites including excentrics, curtains, low walls and pools. The bones and teeth of cave bears have been found here. The exit, not the same as the entrance, is the natural opening into the cave; superb views over Ioánnina.