A haven for book enthusiasts across the street from Retiro Park.

This little sun pays homage to a massive gate that once stood at this location.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

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

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

An automaton perched above an classic clock and watch store

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.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.

This sidewalk tribute honors Colorado's great culinary creation.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

One of the best-preserved medieval streets in Europe.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.