POSEIDONAS CAVE that occupies the site known as "Myli" constitutes a monumental rock-cut tomb or sanctuary. This particular type was very common in the Eastern Aegean Sea. Certain traces suggest the existence of a wooden cover at the cave entrance. The cave was probably a sanctuary dedicated to Aphrodite, a very popular goddess with the lower social class. Statuettes of the goddess have been found in Pigadia. In all probability, the open-air sanctuary of the goddess stood in Parthenos Cave, 2 km away, in the area of Vathypotamos. The cave has been eroded over time due to its continuous and extensive use by shepherds.