Living towers made of people that are now recognized by UNESCO.

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

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

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

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The oldest Roman lighthouse still in use.

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

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

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

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

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

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

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

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

One of the most photographed locations in the entire city.

Once a training ground for Olympic athletes, this artificial ski slope has fallen into ruin after a fire in 2012.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

Preserved behind glass, the ruins of a medieval building used to store human remains.

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

This unique style of bridge is the last of its kind and runs over the straightest canal in Britain.