A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The first green space constructed on an elevated viaduct.

A giant snail sculpture looking longingly at the German traffic museum.

A stairway to heaven, or to nowhere at all.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

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

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

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

How did an Australian statue of the Bard of Avon end up in the Hungarian capital?

A diminutive statue that was inspired by the sculptor's own daughter.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.

A white Buddhist temple with a golden restroom.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This bridge was constructed from the rubble of the infamous Bastille.

A series of playful yellow penguins share a serious message about the environment.

Follow the original medieval paths that wind through this intriguing section of the city.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The colorful stairs are made with marble from the world's major quarries.