A Serbian church lit by chandeliers made of weapons.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

Tiny communists hammer away on the Olomouc Astronomical Clock.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

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

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Once the home of a hermetic monk, this cave now houses a small church.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A Hungarian pharmacy museum with a box full of mummy powder.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Hungarian mummies in beautiful painted coffins.

Mysterious painted skulls in Moravia.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Europe's second largest ossuary wasn't discovered until 2001.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

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

Medicinal spa created with the discharge from a geothermal energy plant.