On the largest of the Ionian islands, Cephallonia, there are many beauty spots and remarkable natural phenomena to delight the visitor. The cave consists of two parts. Investigation by J. Petrocheilos and A. Petrocheilou proved that the roof of the outer section had collapsed and this part had subsequently flooded.
Huge stalagmites show that it was once part of the cave.
Stairs with flowe r-edged landings lead towards the main cave. This is a very large chamber, some 100 m. long, subdivided by blocks of stone which fell from the ceiling and now form a balcony. Translucent stalagmites have grown on their upper surfaces. It is a level floored semi-circular hall, some 20 m. high and measuring 65x45 m., with very beautiful stalactite decoration. It has been laid out so that concerts may be gi ven to audiences of five hundred.