An island off the eastern coast of Puerto Rico, Vieques is a land of untouched beaches, roaming wild horses and spark-filled Bioluminescent Bay.

Established in 1521 by the Spanish, Old San Juan is the oldest city in the United States and its territories. There you'll find colonial architecture, impressive fortifications, cobblestone streets, open plazas, and hidden patios. Nearby, el Yunque National Forest is the sole tropical rain forest in the U.S.