On the eastern coast is the Adriatic Sea, leading into the rest of the Mediterranean through the Strait of Otranto (named after the largest city on the tip of the heel). On the Adriatic, south of the "spur" of the boot, the peninsula of Monte Gargano; on the Tyrrhenian Sea, the Gulf of Salerno, the Gulf of Naples, the Gulf of Policastro and the Gulf of Gaeta are each named after a large coastal city. Along the northern coast of the Salernitan Gulf and on the south of the Sorrentine Peninsula runs the Amalfi Coast.