This semi-secret storybook hedge maze is also the oldest garden in the city.

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.

This huge abandoned fortress hidden inside a mountain holds a world of subterranean secrets.

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

An archeological treasure trove stumbled upon by a couple of children.

A living art gallery painted on a canvas of Monterey pine trees.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

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

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

This influential Renaissance-era library was once the haunt of kings and monks.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A site outside Pedraza, Spain where a plaque tells a tale of seven-legged creatures that were said to have once lived in the area—in the fictional world of Kcymaerxthaere.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A curious memento mori hangs in the magnificent Cathedral of Segovia.