This original Route 66 sign sells for over $1,500 in Williams, Arizona. (Photo by Andrew Evans, National Geographic Travel) ...

Oatman, AZ is located right on Historic Route 66, on the section between Kingman and Topock, Arizona. This stretch of road has been designated a National Back Country Byway.

In the middle of nowhere in Arizona resides the highest part of Historic Route 66, the Sitgreaves Pass. Getting there requires braving the Oatman Highway, a rough-and-tumble mountain road situated ...

Hidden in Arizona's high desert, a stretch of Route 66 challenges drivers with treacherous curves while rewarding them with ...

Wild burros roam the streets in the Historic Route 66 town of Oatman, Ariz. The burros are descended from pack animals turned loose by early prospectors and are now protected under federal law.

A realignment in 1952 swung Route 66 south through Yucca, and Oatman barely hung on. Today, a half-million people visit this rickety outpost each year.

Exiting Oatman, Route 66 morphs into The Sidewinder. This serpentine portion of the road is reported to contain nearly 200 curves, many of them perched precariously on cliff edges absent guardrails.

A new Route 66 Check-In Challenge offered by the Arizona Office of Tourism features historic roadside attractions. These are the best road trip stops.