A hands-off space for graffiti artists to hone and display their skills.

An unusual round church in London with a Templar past.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The beautiful baroque library of the Hapsburg empire.

A spherical "micro-nation" in the heart of Vienna.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Surprisingly Delicious Asian-Style Hot Dogs.

Tiny memorials honor individual victims of the Holocaust.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

A silly medieval mural preserved on the side of a Viennese house.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.