The Drogarati Cave in Kefalonia was discovered 300 years ago and opened to the public in 1963. It was discovered when a strong earthquake caused a collapse that revealed the cave's entrance. Drogarati is an impressive cave with remarkable formations of stalactites and stalagmites. Speleologists say that this cave is about 150 million years old and constitutes a rare geological phenomenon. The cave is about 60m deep and has a constant temperature of 18ΊC. The humidity of the cave reaches 90%.

Melissani cave-lake gives off a rum appeal, as inside the ‘B’-shaped cave is a lake that has a small island, as well as trees and forests surrounding it. Its two chambers, one sun-lit and the other dark and ominous covered with stalagmites, algae and moss, create a unique and unforgettable picture.