The temple that withstood the Nazis.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A collection of art from Bulgaria's time as a communist state.

Sofia's legislative center is continuously reinventing itself.

While it would not look out of place among Serbian spomeniks, this massive Bulgarian monument commemorates one of their defeats.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

A house of bones — but nobody is quite sure to whom they belong.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

Surreal riveted sea forts once protected the Kent shores from German attack.

Go inside to really appreciate this 500-year-old technological masterpiece.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

A museum dedicated to secret surveillance.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

What happens when you cross a mayor and a painter?

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

One of 200 religious buildings recognized as a “culture monument.” 

Gigantic water vessel, permanently grounded in Southern Albania.

Decorated with a staggering 1,380 ladybugs, the installation has turned what was once a grim, forgotten nickel mine into a landmark and a statement.

This pedestrian footbridge honors Pero Jones, an enslaved African who lived in Bristol.

The Bulgarian royal family exclusively used this ornate, now-abandoned train station.

Pull up and have a drink at a museum filled with hundreds of years' worth of shipwreck artifacts.

A supersonic jet stands on a pedestal in this rural village as a monument to military aviation.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.