The Bue Marino Grottos are considered some of the most beautiful grottos in all of Italy, with kilometers of galleries, rivers and subterranean lakes, stalactites and stalagmites, fossils and Neolithic graffiti.
The caves are among the biggest in Sardinia with total length of about 5km. On a guided tour only about 900m meters is visited however. The visitors follow the way the sea penetrates into the mountain creating a salt lake of more than 1squarekilometer of surface. The place is very rich of stalactites and stalagmites. Only underwater speleologists may go further from here.
The name of the cave comes from the presence of Monaca seal, the extremely rare Mediterranean seal (that local people call private://sea oxprivate://, Bue Marino), which till to the '80ies came to grow its puppies in this cave.