The Gulf of Naples, also called the Bay of Naples, is a roughly 15-kilometer-wide (9.3 mi) gulf located along the south-western coast of Italy. 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 Sorrento Peninsula and the main town of the peninsula, Sorrento. The Peninsula separates the Gulf of Naples from the Gulf of Salerno, which includes the Amalfi Coast.

Herculaneum was an ancient Roman town, located in the modern-day comune of Ercolano, Campania, Italy. Herculaneum was buried under volcanic ash and pumice in the Eruption of Mount Vesuvius in 79 AD.