An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

A walkable map of the world, made from soil and stone by one man.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

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

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

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

A muddy alien landscape that is home to rare species of exotic plants.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A naturally beautiful, seemingly bottomless deep blue spring.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

These warring psychedelic crags commemorate an unsuccessful military operation.

Yugoslavia's biggest underground airport lies in ruins.

The remains of a sunken military ship wreck visible through clear water.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.