This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

This colorful gate stands as an entrance to the walled city of Old San Juan.

Archaeological sites and great food inside the island's largest mangrove forest.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

Years of neglect and nature took a toll on this 19th-century lighthouse.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

The world's second largest single-dish radio telescope, once used to contact E.T.