The Bue Marino cave, takes its name from the monk seal that "lived" here until the Eighties and by the fact that the local inhabitants called the seal "sea ox". The cave is divided into two branches. The south branch, equipped to be visited, is formed by a large gallery, in which the sea water enters to form numerous lakes with clear waters. Throughout the route it is possible to admire stalactites and stalagmites of different shades, which thanks to the play of the lights offer a chromatic show of rare beauty. The overall visit lasts about an hour and ends, as far as the southern branch is concerned, in the beach of the Seals, where the monk seal gave birth to her cubs.