1. Puerto Rico
Puerto Rico is perhaps the best known island in the U.S.Caribbean. Long been popular with visitors for its natural beauty, colonial charm and general U.S. standards, the island is also home to some of the region’s best beaches, like Carolina, Luquillo and Seven Seas. When not relaxing on the sand, check out the narrow alleys of Old San Juan, try your luck at the casino, or dance till dawn in the city’s high-octane nightlife scene.