A modernist church in an ancient village.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The Gaudí-inspired building that was the start of Terrassenc modernism.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

This imposing modern citadel started out as a home renovation project.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

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

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

This ancient Spanish castle sits high upon a hilltop.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

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

A Romanesque tower appears when water levels drop.

A charming Spanish village sits atop this natural limestone overpass.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Moorish signal station on a stratgic rocky outcrop.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

The world's largest wooden structure.

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

Cliffside houses provide a spectacular view from their perch above the valley.

A lush indoor jungle fills this bustling Madrid transportation hub.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Commonly acknowledged as the only public monument to the Devil himself.