Blue Cave is the most celebrated attraction of the Greek

Greece

Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

 island of Kastelorizo

Kastelorizo

Kastelorizo, , is a Greek island and municipality located in the southeastern Mediterranean. It lies roughly off the south coast of Turkey, about 570 km southeast of Athens and east of Rhodes, almost halfway between Rhodes and Antalya and to Cyprus...

. The cave lies on the SE coast of the island, and is named by the inhabitants phokialí (Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

 for seal's refuge). Being 40–50 m long, 25–30 m wide, and 20–25 m high, it is much larger than the world famous Grotta Azzurra on Capri

Capri

Capri is an Italian island in the Tyrrhenian Sea off the Sorrentine Peninsula, on the south side of the Gulf of Naples, in the Campania region of Southern Italy...

, Italy. The light of the sun, refracted through the sea, is reflected in the interior of the Grotto, thereby producing a dazzling blue colour. The Cave can be visited only by boat and, since the entrance is barely one metre high above sea level, only under calm sea conditions: the best time of the day to visit is early in the morning, when the sun is still low.