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.

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

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

This community-driven organization uses education and eco-friendly technology to protect the environment.

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

An artist’s underground sanctuary, 40 years in the making.

Drift through underground caves on a tube.

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

This rock in the middle of a river in Jayuya contains dozens of Pre-Columbian Taíno petroglyphs.

This "sausage route" features gorgeous views and family-owned restaurants.

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

A natural swimming pool in the middle of the Carite Forest.

The short hike is worth the stunning views and crystal blue waters of a secluded beach.

Enjoy the waters of this half-moon-shaped natural pool surrounded by breathtaking scenery.

The location of Puerto Rico's first water bottling plant, thanks to a collaboration between Mother Nature and technology.

In a dry, neglected cemetery lies the unassuming grave of a soldier vilified in life but celebrated in death.

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

A ghost town revived by hippies and wanderers throws its own special brand of holiday parade.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

In 1967, murder and mayhem disrupted the tranquility along this quiet stretch of Old Route 66.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

"I did this all while you were watching TV."

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.