Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A lush indoor jungle fills this bustling Madrid transportation hub.

A medieval village holds a very modern hotel.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

This ancient Spanish castle sits high upon a hilltop.

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

A charming Spanish village sits atop this natural limestone overpass.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

"Alleys of Stone" form natural mazes in Spanish natural park.

Moorish signal station on a stratgic rocky outcrop.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

Abandoned Nazi train station turned underground astroparticle laboratory.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Stunning Roman aqueduct used for 1900 years and still standing.

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

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

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

The final resting place of the great navigator, or maybe his brother.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

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

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

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

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.