A sanctuary for sickly, stray, or wounded donkeys.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

Looking like nothing more than a cartoon deserted island, this tiny sandbar is home only to a single umbrella.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

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

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

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

A flower grows on this giant stone that is said be able to control minds.

A hotly contested micro-nation off the coast of Montserrat.

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

The world's brightest bioluminescent bay.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

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

At the "Garage Mahal" in Houston, car culture is about more than just driving.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

Inmates dig the graves at the largest prison cemetery in the U.S., the final resting place of both cowboys and Indians.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

"They died with their boots on."

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Official museum, hall of fame, and repository of the Texas Rangers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

On a dusty county road sit the ruins of a ghost town's abandoned church.

Decades of discarded bottle caps line this alleyway, a fixture of Texas A&M.