A beautiful but toxic fountain of mercury.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

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.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Turntable anonymously received orphans, alms, and groceries.

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.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Structure built from the skulls of vanquished foes.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

Sealing couples' love since just after World War I.

This abandoned Croatian stronghold never saw a great deal of conflict but it is still a beloved relic nonetheless.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

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

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

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

The unusual sculptures are believed to be powerful political symbols.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.