A nightmare for the claustrophobic lies hidden in Southeast Asia.

Khmer Rouge's high security prison.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.

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

A battle between nature and architecture in the Cambodian jungle.

A white Buddhist temple with a golden restroom.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

Bizarre Hindu and Buddhist sculpture park.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

An out-of-place slice of France, smack in the middle of Shanghai.

The once highest point in China blends symbolic design with a kick of adrenaline.

A natural arch offers panoramic views of Yangshuo's karst hills.

The only Chinese temple in Mumbai.

This precariously balanced boulder is said to be a hunk of stolen butter dropped by the gods.

The painted and decorated towers of this Hindu shrine were once the tallest structures in one of the oldest cities in India.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

A centuries-old fortress city lies in ruin.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A blooming house of worship for the masses.

An extraordinary "City of Caves" carved from solid stone.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.