An abandoned brutalist monument whose history has been lost to the ages.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

These warring psychedelic crags commemorate an unsuccessful military operation.

This abandoned airplane hanger is said to have once been a top secret launch facility.

Bridge that died in war and was resurected.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

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

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This architectural oddity is an oasis of green on the outskirts of Valencia.

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.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This former crime corner has been turned into an eclectic community center.

Elevated freight railway turned wildly successful urban park.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A bit of retro transportation flair preserved in the world's largest department store.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

Renaissance villa and gardens complete with a tormented colossus.

A 16th-century horror show built in a lovely Italian garden.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

This Romanian village may have been drowned, but it is long from forgotten.

This massive underground salt mine now holds a sci-fi theme park in its depths.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.