The submerged structures were once part of a luxurious Roman villa that extended from the hillside down to the sea.
Changes in sea level over two millennia, due to the bradyseism characteristic of the Phlegraean Fields, caused these buildings to sink.
The park protects rare species including the 'Patella ferruginea', a large mollusk currently at risk of extinction.
The island of Gaiola is locally famous for a series of 'unlucky' owners who experienced misfortune, fueling local folklore.
The area contains a 'ninfeo' (nymphaeum) that was once used for elaborate Roman social gatherings.
The submerged ruins provide a unique artificial reef habitat that supports high levels of Mediterranean biodiversity.
The Parco Sommerso di Gaiola is a protected marine area spanning 42 hectares, preserving both the biological ecosystem and the submerged Roman archaeological remains of the ancient Imperial villa of Pausilypon. The site sits within the Calogero valley between Marechiaro and Trentaremi Bay in Naples. Visitors can observe the sunken ruins, including structural remains of maritime villa floors, port installations, and fish ponds, directly through the water or via specialized tours. The park serves as a hub for marine research and environmental education. Access is strictly regulated to prevent damage to the delicate underwater archaeological structures and marine life. Snorkeling and glass-bottom boat tours provide the primary access to the submerged site. The area is named after the two small islands (Isolotto della Gaiola) located a few meters from the coast.
The elevated vantage point on Discesa Gaiola looking down toward the two small islands and the villa ruins.
Book guided boat tours or snorkeling sessions online well in advance, as access to the protected zone is strictly capped.
Bring an underwater camera or GoPro to capture the Roman mosaics and walls visible beneath the surface.
Wear water shoes, as the entry point to the water consists of rocky shorelines rather than sand.
Do not attempt to swim to the restricted marine zones without the required park authorization or tour guide.
Closed on Mondays throughout the year.
Strictly no-take zone; touching, removing artifacts, or disturbing marine life is prohibited by law. Use only mineral, eco-friendly sunscreens.
