Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

A museum dedicated to a Cold War era sausage.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

Pop culture has helped to keep this iconic British building from being destroyed.

Public access to clean drinking water was an instant hit among the masses.

Artists and musicians now rule over this former rail station.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A kaleidoscopic warehouse-maze of handmade neon signs.

Hungarian self-built castle.

The abandoned military base looks like a post-apocalyptic wasteland.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

When you've got to go, you've got to go.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

An Art Nouveau building covered in animal gargoyles and grotesques.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

This derelict superstructure was a very important warning system for the Soviet military.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.