This 7,000-year-old megalithic wonder covered by a Franco-era reservoir emerges in times of drought.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

This 47-story "M" needed 20 years to be completed

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

A micro-communist utopia in Spain with no police, no mortgages and full employment.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

This ancient Spanish castle sits high upon a hilltop.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

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

Mysterious Spanish catacombs of unknown origins.

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

A charming Spanish village sits atop this natural limestone overpass.

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

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

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

When World War II came to Canada, Fort Péninsule was part of the first line of defense for Allied shipping convoys.

A controversial blue hoop has been puzzling freeway drivers since 2013.

This impressive working clock made of 16,000 plants changes its flowers twice a year.