5,000 skulls in memorial to those killed by the Khmer Rouge.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Nelson Mandela lived here with his family from 1946 until his arrest in 1962.

“The oddest pub in South Africa,” inspired by a practical joke.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

These otherworldly caverns form Earth's oldest known cave system.

A museum of memories in what was once one of the most violent cities in the world.

This unofficial museum details the rise and fall of Colombia's most notorious narcotrafficker, Pablo Escobar.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

Cathedral carved out of salt, located a mile below the earth's surface.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

An explosion of natural color known as "the river that ran away from paradise."

The Andean town where every single building is decorated with a brightly colored frieze.

Visitors can swim with vicious predators in Crocosaurus Cove's plastic daredevil enclosure.

This eccentric cave dwelling is bizarre even by the standards of a subterranean town.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

Occult books, tarot, oddities.

Australian Lake set aglow by Noctiluca Scintillans.

An Australian lake whose pink hue defies scientific explanation.

Have fun at the world's first Buddhist waterslide park.

The largest tiger reserve in India is a vast expanse dotted with ancient ruins of Nagarjuna Viswa Vidyalayam.