Vibrant street art created with mixed media.

Giant topiary dog once played a role in a terrorist bomb plot.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

A micro-communist utopia in Spain with no police, no mortgages and full employment.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A Spanish artist builds his own castle.

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

A huge cathedral single-handedly constructed by one eccentric monk.

This century-old ruined temple was reborn as "The Church of Skate."

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

Of course Salvador Dalí lived in a castle...

Village situated on a narrow volcanic escarpment.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

An architect transformed this abandoned cement factory into his castle-like workshop.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

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

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

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.