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

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

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

One of the best examples of the modernist movement in Madrid.

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

Inaugurated three times, this tower offers some of the best views of Madrid.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

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

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

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

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

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

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

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

The world's largest wooden structure.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

The world's most elegant power lines.

Crumbling necropolis set high above Fez.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.