This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

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

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

The chefs at El Diablo use heat generated by an active volcano to cook the food.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

This cemetery features modernist statues as strange as its name.

A once-secret library of Freemason history in Catalonia.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.