Lavish royal estate punctuated with heated greenhouses.

Theme park featuring miniature replicas of European monuments.

The oldest building in Madrid.

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

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

An old, deep well, connected with a miraculous, divine rescue and the patron saint of Madrid.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

Remains of the lost church hide beneath this Spanish Parliament building.

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

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

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

A subterranean relic of the Spanish Civil War hides below this picturesque park.

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

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

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

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

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

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

The morbid items in this small and hidden museum are not for the weak stomached.

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.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.