Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A Wild West jailhouse that slid down the mountainside.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

A mysterious "wedding cake" castle in the middle of the urban desert.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

A natural history wunderkammer in the middle of the desert.

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

An urban laboratory.

An artificial crater field that trained astronauts for lunar exploration.

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

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

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

This golf ball–shaped former desert real estate office now houses a UFO museum.

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

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

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

A spiritual vortex among the red rocks in Sedona.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.