A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

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

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

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

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

A science fiction-inspired apartment building designed by a famous Spanish architect.

This medieval chapel is now a shrine to the region's favorite sport.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

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

Abandoned Nazi train station turned underground astroparticle laboratory.

This Canadian hunting lodge is a long way from home.

This memorial, built by fascist dictator General Franco in 1960, has been repurposed by the people of Catalonia.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

Historic medieval fortified city in southwest France.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

French commune at the heart of conspiracies.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Wonderland replication in progress by one persistent man.

Village situated on a narrow volcanic escarpment.