Underwater City in Italy
The most well known underwater city in Italy is Baia, located in the Campania region near Naples. Parts of this ancient Roman resort now lie submerged in the Bay of Naples.
Why Is Baia Underwater?
Baia sank gradually due to a combination of volcanic bradyseism and rising sea levels. Over centuries, the ground shifted and the coastline submerged, leaving ruins, streets, and villas beneath the water.
Visiting the Underwater Ruins
Visitors can explore Baia by glass bottom boat, snorkeling, or diving. Guided tours highlight visible mosaics, columns, and streets. For details on access and rules, check the official Parco Archeologico dei Campi Flegrei site at Parco Archeologico dei Campi Flegrei.
