The Gulf of Naples (Italian: Golfo di Napoli, also called the Bay of Naples) is a c.15-kilometre-wide (9.3 mi) gulf located along the south-western coast of Italy (province of Naples, Campania region). It opens to the west into the Mediterranean Sea. It is bordered on the north by the cities of Naples and Pozzuoli, on the east by Mount Vesuvius, and on the south by the Sorrentine Peninsula and the main town of the peninsula, Sorrento.