The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A science fiction-inspired apartment building designed by a famous Spanish architect.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

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

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

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

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

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

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Built to power trains, the engines in this building provided the entire city of Madrid with electricity during the Spanish Civil War.

A lush indoor jungle fills this bustling Madrid transportation hub.

A pair of gigantic baby heads greet passengers at Atocha Station.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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