The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

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

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

This mountaintop observatory is home to one of the world's largest reflective telescopes.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Geological storytelling.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

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

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

This postmodern apartment block was designed to be a vertical neighborhood.

An out-of-place grove of sequoias thrives in northern Spain.

A historic Christian shrine nestled within a spectacular natural cave.

Spain's stunning solar energy plant.

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

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

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

The oldest Roman lighthouse still in use.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

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

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

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.