This unassuming stone bollard is a centuries-old marker denoting the center of the city.

An installation that makes understanding the size of the universe a walk in the park.

Banished from town, this local jester concocted a clever return.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A masterpiece of Rationalist architecture in the center of Madrid with lizards on it.

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

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

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

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

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

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

The Spanish king's private bathroom embraced the idea of a porcelain throne.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

These ancient artifacts are a testament to the enduring significance of the bull in Spanish culture.

This enigmatic Iberian sculpture of uncertain origin may have once guarded a burial site.

The remains of this misplaced church were moved here stone by stone.

Once a resting spot for King Fernando VII.

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

This 40-meter waterfall of light graces one of the most iconic stations in the Madrid metro network.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

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

These exceptionally narrow openings between giant rocks will test your daring.