An off-the-beaten path cave with an underground lake.

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

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

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

This Old West prison built into the side of a cliff was said to be inescapable.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

The biggest solar telescope in the world helps reveal the secrets of our sun.

Legend says train robbers stashed their gold within the depths of this unusual cave.

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

Take a monster truck tour around an ostrich farm in the middle of the desert.

This giant steer-skull edifice refuses to die.

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."

These free-roaming horses were once destined to disappear from the land.

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

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

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

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

What is the Thing?

The world's largest military aircraft cemetery.

Miniature art that tells an enormous story.

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

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