A multiversal transit station located right below a highway interchange.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

When ecosystems collide in the arid Southwest.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

A house carved into a rock in the 1940s.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

A museum devoted entirely to the rattlesnakes and snake-related art.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

This working class sculpture pounds his hammer all the livelong day.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

Eat the ultimate iteration of Portugal's most beloved pastry.

One man's remarkable private collection of art from around the world.