A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

A model solar system adds a celestial touch to this suburban park.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

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

You can soak in three relaxing pools filled daily by the tide.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

Hundreds of caves once used to store grains and animal feed.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

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

A historic Christian shrine nestled within a spectacular natural cave.

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

Seaside ruins of a settlement that date back to the first century B.C.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

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

This enchanting natural park is a magical example of a temperate rainforest in Europe.

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

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

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

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.