This former steel and coal plant is now a neon-lit industrial fantasia.

The narrowest street in the world is in danger of closing up entirely.

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

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

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

An homage to the medieval rulers of Bulgaria.

Sofia's legislative center is continuously reinventing itself.

A vast Communist-era exhibition space in the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Elevated freight railway turned wildly successful urban park.

Macabre astrological automaton clock dating to the late 1400s.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Go surfing on this urban wave, "hacked" by local surfers.

It's good luck to be mocked by this monkey.

One of the most well-known city festivals in the world.

In this truly magical place, rent hasn't been raised since the year 1520.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.