Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

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."

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

This embalmed man is one of the best preserved mummies from the Canary Islands.

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

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

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

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