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

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

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

The oldest Roman lighthouse still in use.

This ancient Spanish castle sits high upon a hilltop.

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

Stunning Roman aqueduct used for 1900 years and still standing.

A completely underwater art museum sends a stark message about humans' impact on the environment.

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

Village situated on a narrow volcanic escarpment.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

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

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.