The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.

If you visit the burial place of King Frederick the Great, you'll likely find a couple of potatoes sitting on his tombstone.

The "Prussian Versailles" that is as glorious today as when it was built.

Check the time in 145 countries at once with this East German relic.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

A tribute shrine where the Space Invasion street art movement started.

France's most famous cemetery, with some of its most curious tombs.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

The oldest garden in Prague, once part of an medieval orchard.