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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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 magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

A darkly erotic open-air statuary in Catalonia.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

A Romanesque tower appears when water levels drop.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

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

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

A Spanish forest is filled with mysterious stone carvings.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

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

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

One of Europe's largest supercomputers is housed inside of a disused chapel.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

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

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

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

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