This air raid shelter from the Spanish Civil War is now a museum dedicated to the history of the city's bombardment.

A botanical garden full of thought-provoking contemporary sculptures.

This rough experimental house was created by flooding a dirt hill with concrete.

This magnificent brick dome was made with an unusual design method.

Stop by, and you'll receive a map to two well-preserved ancient petroglyph sites.

Rumors and legends of secret Nazi activities surround this eerily remote island mansion.

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

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

This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

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

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

An early 20th-century bullring converted into a modern shopping center.

The unexpectedly beloved remnants of a controversial thermal power plant.

A celebration of solstice followed by a fiery purging of evils.

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

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

Stunning Roman aqueduct used for 1900 years and still standing.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Death road of Bolivia.