Northeast of Naples and San Severo in the Adriatic Sea, the snorkeling off Cretaccio Island offers wide shallows for observing the marine life in clear waters. Cretaccio Island is part of the Tremiti Archipelago and has been called the Pearl Of The Adriatic. This boat-accessed snorkeling dive site is accessible from San Domino Island. There is a ferry from Termoli to San Domino regularly.
Overall, Cretaccio Island is the 12th most popular snorkel dive spot of all 20 snorkeling dives in Italy.