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

An abandoned saucer-shaped monument in the Bulgarian mountains.

An abandoned Byzantine fortress and notorious prison.

A whimsical bridge adorned with decorative dragons.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This one-time health resort was used by aristocrats around the world.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

An ancient knight and a symbol of the city's freedom.

This picturesque medieval monastery guards a small trove of historic treasures.

Gargoyle head that brings good luck.

Where the lovelorn find a home for their sentimental keepsakes.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Bridge that died in war and was resurected.

What happens when you cross a mayor and a painter?

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

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

The biggest and deepest Cold War bunker open to the public can be found in southeast England.