Wonderland replication in progress by one persistent man.

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

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

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

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

Spain's stunning solar energy plant.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

An architect transformed this abandoned cement factory into his castle-like workshop.

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.

Village situated on a narrow volcanic escarpment.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

Bacteria and algae give the salty water its bubblegum hue.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

A cluster of granite granaries perched on stilts.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.