Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

Where once there was a train station bathroom, there is now this German burger joint.

This monumental work of art symbolizes the coming together of a previously divided city.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

A visionary precursor to the Internet made of index cards.

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

A former ironworks that was the first UNESCO industrial site.

After the construction of a nearby cathedral obstructed the view, the oldest belfry in Belgium was more than doubled in height.

Art historians have debated the identity of this medieval stone rider since the 19th century.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Hungarian self-built castle.

A small town Romanian cemetery filled with darkly humorous gravestones.

A collection of items from a way of life that no longer exists.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.