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

Khmer Rouge's high security prison.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The world's most remote airport.

The largest stone moai on Rapa Nui.

Macabre astrological automaton clock dating to the late 1400s.

This giant bronze Buddha, the third largest in Japan, is the last in an ill-fated series of statues.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

This Japanese national treasure was originally built in 593.

Peace Park and the Atomic Bomb Dome.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.