A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

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.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

Khmer Rouge's high security prison.

A quick and simple solution to Cambodia's train woes.

An abandoned Cambodian resort that mirrored the downfall of the country as it was happening.

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

A battle between nature and architecture in the Cambodian jungle.

A former French military respite turned jungle tourism hotspot.

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

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

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

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An extravagant monument to an extravagantly unpopular Emperor.

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

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A display of magnificent stained glass windows is the first exhibit of its kind.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This elaborate towering structure was once famed for its revolutionary height.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.