A nightmare for the claustrophobic lies hidden in Southeast Asia.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Khmer Rouge's high security prison.

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

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This massive water spout has been luring visitors for hundreds of years, some to their death.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Australia's largest medical museum featuring a 19th-century pharmacy.

Come for the flowers, stay for the bats!

Nature is leading a successful mutiny on this century-old freighter.

A local landmark that has become a hub of graffiti and urban exploration.

The world’s most primitive form of bungee jumping.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Amsterdam's Red Light District leaves little to the imagination.

A microcosm of the whaling industry in a small Australian town.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Catacombs turned marketplace.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Notorious artist squat renovated into legal studios.

A little sculpture with a large wardrobe.

Art and a pun, all in one.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

One of Australia's largest secondhand bookstores.