Melissani Cave, also known as the Cave of the Nymphs, is undoubtedly the most enchanting attraction of Kefalonia. The crystalline waters of the cave are between 10 - 30 meters deep. It was discovered by speleologists in the 50s and based on the stalactites in its interior, they concluded that it is 16.000-20.000 years old. After a major earthquake a big part of the roof collapsed and this created a huge dome which allows the sunlight to come in the cave. According to findings from a small island in the lake, this place was used in ancient times to worship the goat-footed god Pan and his followers, consisting of beautiful girls, nymphs.