Khmer Rouge's high security prison.

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

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

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

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

A haunting collection of the vanished and disappearing natural world.

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

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

This museum houses an imposing skeleton army comprised of creatures great and small.

A museum of magic with a Sadist past.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Nailing a coin to this holy stump is just another way to ask the gods for relief from dental pain.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

Last stop before the top of the highest peak in the world.

Sacred Buddhist home of some spiritual monkeys.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

A white Buddhist temple with a golden restroom.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

This extensive collection of dead bugs may be the world's most idiosyncratic and personal insect museum.

The second largest reclining Buddha in the world got "lost" for over 120 years.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.