An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

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

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A motel dedicated to Southwestern nostalgia.

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

An urban laboratory.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

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

A stealthy Apache hideaway that became the haunting site of a mass grave.

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A museum and tribute to a brave profession.

A self-built castle made by a mysterious man.

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

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Solving a 60-year mystery finally gave a name to the young woman known only by the color of her clothes.

Elvis's own personal tropical hideaway.