Semi-mystical manmade towers of rocks decorate this rocky seaside.

Religious dwelling in a Spanish volcano.

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

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

An ornate tower shows off a local artist's architectural flair.

Remote, beautiful, and stigmatized, Las Hurdes is Spain's version of Appalachia.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

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

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

Mysterious face-like images that appeared within an Andalusian house are surrounded by legends of the paranormal.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

The remains of an encyclopedic sculpture garden later used as an internment camp.

A network of hundreds of interconnected wineries in caves hides under the town center.

A contemporary art installation housed within a Gothic cathedral.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

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

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

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

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

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

Haunted tuberculosis hospital built by the patients.

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