Hi there,
A ferry to Culebra Island is fairly cheap and getting to the island is very straight forward from San Juan.
Culebra Island is mostly a wildlife refuge with fantastic and beautiful scenic sandy beaches. The waters surrounding the island are crystal clear which offers a great snorkeling and scuba diving experience to appreciate the unspoiled reefs.
Probably, the most popular beach where you can enjoy water activities such as scuba diving, deep sea fishing and so on is Playa Flamenco.
Travadvice360