Blue Cave is one of the largest and most beautiful caves in a series of caves - located along the very jagged coast of the peninsula Lustica in Boka Bay. The cave is located between the Bay of Zlatna Luka and Cape Mokra Gora. There are two holes at an angle of 45 °, a small hole on the south side and a larger one at the southwest that is 3 m high and about 15m wide so you can get inside the cave with ordinary barges and smaller boats. The sea depth inside the cave is 3 - 8m. Height from the sea level to the top of the ceiling is 9m, and its size is approximately 300m ². Its name comes from an unusual crystal blue color resulting from the reflection of rays on the surface during sunny days.