This historic national park is covered in the stunning ruins of red rock pueblos.

An urban laboratory.

America's only nuclear missile silo open to the public.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

See massive fossils that are over 200 million years old in northeastern Arizona.

A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A self-built castle made by a mysterious man.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.