After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Once a year, at exactly 11:11 a.m., this monument comes to life.

A natural history wunderkammer in the middle of the desert.

Stairs often replace streets on the steep slopes of this old mining town.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A Wild West jailhouse that slid down the mountainside.

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

A geological mystery on Camelback Mountain.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

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

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

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

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

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

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

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

The world's largest military aircraft cemetery.

An urban laboratory.

A motel dedicated to Southwestern nostalgia.

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