This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Notorious artist squat renovated into legal studios.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

An early 20th-century bullring converted into a modern shopping center.

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.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A museum which takes visitors to the côté obscure of Paris.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

The quirky - and private - constructions of a secluded artist depict the house of God.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.