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

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

Spain's stunning solar energy plant.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

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

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

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

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

This lucky bronze frog was gifted to Madrid by a casino.

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A medieval village holds a very modern hotel.

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

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Rare karst landscape eroded from a flat seabed.

"Alleys of Stone" form natural mazes in Spanish natural park.

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

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

A charming Spanish village sits atop this natural limestone overpass.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

Stunning Roman aqueduct used for 1900 years and still standing.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

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

The world's largest wooden structure.