A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

A pair of gigantic baby heads greet passengers at Atocha Station.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

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

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

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Commonly acknowledged as the only public monument to the Devil himself.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

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

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

At this concrete bunker on the Trondheim fjord, secrets lie above and below the water's surface.

A museum dedicated to Norwegian music, old and new alike.

The world's first and only escalator for lazy bicycles and their daunted riders.

The world’s second-largest flood defense barrier has protected London for decades.

The ground on which Shakespeare’s initial playhouse once stood.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

Three bridges straddle a stream, one stacked upon the other.

At the United Kingdom's only residential library you can sleep among the books.

This natural spring is the winter home to the largest gathering of manatees in the world.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...