A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

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.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A series of bronze circus performers spread throughout a Slovakian shopping center.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A prestigious learning institute of old Shanghai.

An eerie, derelict amusement park in Berlin.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

You've probably seen these distinctive orange-tiled columns on the big screen.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Art installations, derelict railcars, and endangered grasshoppers all call this south Berlin park home.

Started as a kitchen garden, now the second largest botanical garden in the world.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The best place in the world to buy tinned fish.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This charming candle shop has been in business since 1789.