It is a cave in the Kas province of Antalya.
The Blue Cave, which is located between Kas and Kalkan, is 18 km away from Kaş and 6 km away from Kalkan. It is close to Kaputaş Beach. Blue Cave, formerly known to have lived in seals, It was found by Temuçin Aygen. Sunlight enters into the cave by reflecting from the bottom of the sea and brings the blue bright phosphorescent color to the waterfall. The cave is 50 m long, 40 m wide and 15 m high.