Entering Tennessee on US 421. [800x600][1600x1200]
It's a very winding road. [800x600][1600x1200]
A sign back in Boone told truckers to consider alternate routes because of switchbacks. [800x600][1600x1200]
Unlike the usual switchbacks, where you go one way then turn sharply, then the other for a while, and turn sharply, most of these were quick "S" curves, one after another. [800x600][1600x1200]
More curves. [800x600][1600x1200]
The road crosses the Appalachian Trail. [800x600][1600x1200]
There's the trail, northbound. [800x600][1600x1200]
Walk several hundred miles up this way and there's North Adams. [800x600][1600x1200]
A picture, probably taken by mistake in Bristol, Tennessee. The signs in Bristol that lead to I-81 seem to take a very long and twisted route through the city. [800x600][1600x1200]