This chest hospital with a dark, haunted past serves as a fitting set for horror films and a paradise for ghost hunters.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

This abandoned racetrack looks like it is set to hold competitions in the apocalypse.

Abandoned waterpark turned counter-culture mecca.

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

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

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

A surrealist labyrinth and museum of contemporary sculptures.

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

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

This Funeral Hearse Museum represents the finest in cadaver transportation.

This cemetery features modernist statues as strange as its name.

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

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

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

This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

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.

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

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

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

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

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