An island filled with hundreds of hanging, decomposing, decapitated dolls.

The site of the first medieval crusade that pitted Christians against Christians.

The world's largest reflecting pool is just two centimeters deep.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

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

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

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

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

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

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

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.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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.

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.

Legendary site where an evil bishop was devoured by rodents.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The prototype for all Nazi concentration camps.