The world's largest military aircraft cemetery.

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

Collection of vintage trailers double as hotel rooms.

Miniature art that tells an enormous story.

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

Don't blink or you'll miss it.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

An artificial crater field that trained astronauts for lunar exploration.

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

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

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

The eroded core of an ancient volcano is now accessible by a short hike.

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

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

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

The lost ruins of the forgotten ferry lie hidden beneath the silt.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

A rare wayfinding portmanteau of “Street” and “Avenue.”

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.

The stone-covered graves lie within the ruins of an Old West ghost town.