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

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

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

Geological storytelling.

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

A fantastic Christmas tradition where defecation meets the manger.

A 16th-century Andalusian palace.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

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.

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

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

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Week-long block party becomes a competition for the best decorated street.

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

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

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.