The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This abandoned Belgian fortress is purposefully being left to nature.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This cemetery features modernist statues as strange as its name.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

Single runway interrupted by a busy road that cuts across its middle.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

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

Oriental bazaar in the heart of Sarajevo.

These warring psychedelic crags commemorate an unsuccessful military operation.

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.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A tiny church on a man-made island in the Adriatic.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.