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

A museum dedicated to a Cold War era sausage.

This amazing piece of modern art honors the hundreds of fishermen killed during Cambrils' "year of misfortunes."

An unusual but excellent display created in the 1930s as propaganda against the Freemasons.

A Romanesque tower appears when water levels drop.

Abandoned Nazi train station turned underground astroparticle laboratory.

Of course Salvador Dalí lived in a castle...

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

Mysterious Spanish catacombs of unknown origins.

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

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

A charming Spanish village sits atop this natural limestone overpass.

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

Cliffside houses provide a spectacular view from their perch above the valley.

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

A once-secret library of Freemason history in Catalonia.

Stunning Roman aqueduct used for 1900 years and still standing.

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

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

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

A Spanish town built into the cliffs.

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

Village situated on a narrow volcanic escarpment.