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

An isolated village literally built into the crevices and rock formations of a mountain.

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

A Spanish forest is filled with mysterious stone carvings.

A stately palace has been converted into the world's largest cannabis museum.

Turntable anonymously received orphans, alms, and groceries.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

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

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

Bacteria and algae give the salty water its bubblegum hue.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

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

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

Week-long block party becomes a competition for the best decorated street.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

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

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

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Wonderland replication in progress by one persistent man.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Mountain where Jesus was first tempted by the Devil.

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

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