Apache Trail Highway, Arizona Route 88

Cutting through the rugged Superstition Mountains from the towns of Apache Junction and Tortilla Flat to Roosevelt Lake, Arizona's Route 88 -- a.k.a the Apache Trail Highway -- is a gorgeous ride with endless spots of oohs and ahhs. Unfortunately, it is also one of the worst, most treacherous roads I've driven in all the United States. It winds its way around cliffside after cliffside on a pothole-infested, one-lane road that somehow is declared suitable for two lanes. And those two lanes are filled with large pickups pulling boats to the various recreational spots in the area. But if you survive, it's hard to mind a slow ride through unspoiled southwestern desert wilderness. If you're going, the best vehicle to take is a small car with good shocks. (And air conditioning!)