Single runway interrupted by a busy road that cuts across its middle.

Budapest's Communist-era statues, banished to the suburbs.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

Steadily reminding Czechia of its past.

Monument to a suicide protesting the Soviet invasion.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A church of bones, decorated with 40,000 human skeletons.

Khmer Rouge's high security prison.

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

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

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

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

A battle between nature and architecture in the Cambodian jungle.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

Denmark’s never-ending bridge.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

Preserved "bog person" that is over 2,000 years old.