You don't need to be religious to appreciate the calming atmosphere of Duomo di Gaeta. Find out when the next mass starts or when you can go for a wander through.
This principal church is often on the itineraries of visitors to Gaeta. But Duomo di Gaeta isn't the only highlight in the area. Serapo Beach, Parco Regionale Riviera di Ulisse, and Ariana Beach are some other interesting sights close by.