This little sun pays homage to a massive gate that once stood at this location.

The oldest building in Madrid.

Nicknamed the "Spirit of Paul Klee," this colorful apartment building features an array of multicolored panels.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

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

Strange masks and obscure costumes are housed in this old Madrid corrala.

This postmodern apartment block was designed to be a vertical neighborhood.

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

This small museum tucked within a subway station holds pieces from Madrid's past.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

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

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

This lucky bronze frog was gifted to Madrid by a casino.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

The earliest known map to show America, discovered by accident at a Paris bookshop.

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

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

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

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.

A 16th-century Andalusian palace.

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