A contemporary art installation housed within a Gothic cathedral.

An eerie collection of the surviving structures from a past celebration of the future.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

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

The final resting place of the great navigator, or maybe his brother.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A lush indoor jungle fills this bustling Madrid transportation hub.

The world's largest wooden structure.

Commonly acknowledged as the only public monument to the Devil himself.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

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

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

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

A Spanish town built into the cliffs.