The Blue Cave is on the southeastern side of the island, twenty minutes by boat from the harbor. It is the largest and most beautiful of the caves in Greece. It is 75 meters long and 35 meters high. The entrance of the cave is comparatively low at the height of the small boat and the passengers are often bent. The cave is decorated with stalactites that create a unique spectacle. It also preserves the names of "Cave of Parasta" or "Fokiali", from the monachus monachus seals residing there.