This natural wonder is hidden in the Biševo island cliffs in a small bay called Balun on the south-east side of the island.
The grotto is one of the best known natural beauty spots on the Adriatic and popular show cave because of the glowing blue light that appears at a certain time of the day when the sunlight is reflected through the entire cave in aquamarine light while objects in the water are turned into shimmering silver.
The sea waves eroded the limestone rock of which the whole island of Biševo is composed and made this phenomenon.
The only way to explore the Blue cave is by boat. On our Blue cave & four islands trip, we visit this spot on the best time of the day when you can see all its beauty.
