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

A towering monument in Spain has proven to be more labor-intensive than initially planned.

A huge cathedral single-handedly constructed by one eccentric monk.

This ancient Spanish castle sits high upon a hilltop.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

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

Mountain where Jesus was first tempted by the Devil.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Stunning Roman aqueduct used for 1900 years and still standing.

Super Robot anime statue guards a forgotten suburban development in Tarragona.