The world's brightest bioluminescent bay.

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

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

This ''hidden'' 19th-century bridge played a simple, yet important role during the Spanish-American War.

This small primate research island is teeming with playing, fighting wild monkeys.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

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

This tiny home was originally a narrow alleyway.

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