In the Virgilian poem Aeneid, Palinurus Is the name of Aeneas' steersman, fallen overboard in this area. Nowadays Cape Palinuro is a rocky promontory in the National Park of Cilento and Vallo di Diano. The high vertical limestone walls, sink In the south Tyrrhenian Sea is a depth of 45/50 metres. Divers can find all the typical mediterranean benthic fauna like a big quantity of red coral Corallium r^-ubrum, sea fans Eunicella cavolinii, Paramuricea clavata, Leptogorgía sarmentosa and spiny lobsters Palinurus elephas. Among fishes we have dusky and golden groupers Epinephelus marginotus and Epinephelus alexandrinus, brown meagres Scíaena umbra, dentex Dentex dentex and greater amberjacks Seriola dumerili. Here are animals we can find only in the southern regions: the purple starfish Ophidíaster ophidianus, the ornate wrasse Thalassoma pavo, the star coral Astroides calycularis. Moreover, waves erosion and sulphureous waters coming from hydrothermal springs, carved in the limestone rock a lot of cavities (35) now submerged for the most part. They have different conformation, population and difficulty. For the reason given above, Cape Pallnuro Is one of the main places for marine cave diving in Europe. Of course we find "darkness lovers" like the leopard goby Thorogobius ephippiatus, the cave spider crab Herbstia condyliata, the rare black faufre Olígopus ater and the sponge Petrobiona massiliana, considered extinct. Marine caverns and caves are something special that touches and enraptures. Columns and stalactites that centuries ago were in the open air, ancient sea levels, sulphureous springs and warm waters (24°c ). Particular and exclusive marine life, plays of light and shadow are ingredients of a dive that improves the Underwater Planet and, sometimes, we ourselves knowledge.