This piece of early engineering is rather unknown despite its location in the heart of Madrid.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

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

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

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

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

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

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

A comprehensive look at the art of Joaquín Sorolla in his former home in Madrid.

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

This open-air sculpture museum is located under a bridge in the center of Madrid.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

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

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

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

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

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

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

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

Once a resting spot for King Fernando VII.

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

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.