The first mosque in the world to receive electricity.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

The place where World War I began.

A war-torn Olympic relic is being overtaken by graffiti and nature.

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

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

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

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

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

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

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

This massive subterranean fissure is known as the "underground Grand Canyon."

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

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

A relic of World War I that now exist as a piece of public art.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.