The world's brightest bioluminescent bay.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

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

This former sugarcane transport tunnel is now a portal to a lovely beach.

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

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.