Luquillo Beach offers a quintessentially Caribbean slice of coastline close to Puerto Rico's bustling capital ... and surrounding waters are part of La Cordillera Reef Nature Reserve.

This south Vieques beach might not sound like much, but it's one of travelers' favorite experiences in Puerto Rico. During the day, Mosquito Bay is nothing special as Caribbean beaches go.

The Reserva Natural Cayos de la Cordillera is a national park that protects the Cordillera Cays, a series of small, uninhabited islands off the east coast of Puerto Rico. Cayo Icacos, aka Icacos ...