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

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

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

This abandoned Antarctic research station is a Soviet ghost frozen in time.

Abandoned substation turned village treasure.

Two monstrous faces loom over a village in Czechia.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Moss and stone turn this waterfall into an otherworldly liquid veil.

A collection of abandoned typographic signs from Berlin and beyond.

A slice of central Asia in the middle of Berlin.

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

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Modern art commemorates one of the first military actions of World War II.

This Communist-era residential block is one of the longest residential building in Europe.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This Romanian village may have been drowned, but it is long from forgotten.

Space-age monument to an early 20th-century uprising.