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

This Funeral Hearse Museum represents the finest in cadaver transportation.

This cemetery features modernist statues as strange as its name.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Art and a pun, all in one.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Mountain where Jesus was first tempted by the Devil.

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

A once-secret library of Freemason history in Catalonia.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

Turntable anonymously received orphans, alms, and groceries.

This massive library holds what was once the largest book collection in the world.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

This forlorn park is the result of a failed investment turned tax dodge.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.