This 18th-century water provider for Aranjuez was refurbished in 2013 only to be neglected again.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

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

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.

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

Of course Salvador Dalí lived in a castle...

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

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

This plaque marks the site where the penultimate chapter in the journey of two doomed boys unfolded in an imagined parallel universe.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

An ancient Egyptian temple in the middle of Madrid, Spain.

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

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

A once-secret library of Freemason history in Catalonia.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Moorish signal station on a stratgic rocky outcrop.

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

Salaguti's live-in museum: a fortress against criticism and consumer art.

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

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