A model solar system adds a celestial touch to this suburban park.

Five million people are laid to rest here, more than the population of Madrid itself.

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

This technological marvel is one of the world's first 3D-printed bridges.

Shrapnel, dynamite, bullets and Franco couldn't destroy this bust, rescued and kept hidden as a family secret for over 40 years.

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

A towering monument in Spain has proven to be more labor-intensive than initially planned.

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

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

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

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

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

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

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

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

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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.

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

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

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