In the heart of the Guatemalan jungle, surrounded by lush vegetation, lies the ruins of an ancient Mayan civilization, inhabited from the 6th century BC to the 10th century AD. The ceremonial center is home to massive temples, palaces and public squares accessed by ramps.

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.