History, myth, worldliness, extravagance and seductive beauty have made the Blue Island extraordinarily unique and famous. Thanks to the infiltration of the sea, over the millennia, inlets and caves have been created in the rock. There are about 65, along its perimeter: the enchanting and famous Blue Grotto, the White Grotto, with its stalactites and stalagmites, the Green Grotto with crystalline emerald green water, other small and large, submerged caves.