An enchanting natural wonder in Puerto Rico's Camuy River Park.

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

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

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

The world's brightest bioluminescent bay.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

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

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

An abandoned observatory in the middle of the Illinois prairie.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

Abandoned former poorhouse, bible college, and haunted house in an Ohio hamlet.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

An abandoned stretch of highway, deteriorating next to the operational one.

A miniature world of concrete and stone in Springfield, Ohio.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

A New Hampshire grave with a grudge.

The beloved home to all publications indie, erotic, and punky.

The history of funerals and funerary customs.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

An abandoned meat mecca now serves as an excellent locale for urban exploration.