Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

Archaeological site of Iberian people ruins.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

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

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

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

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

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

Religious dwelling in a Spanish volcano.

An abandoned socialist utopia built in the late 19th century.

This abandoned naval battery stood at the ready as recently as the 1980s.

A small church ornamented with medieval erotic sculptures.

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

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

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

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

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

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

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

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