13.The Million Dollar Highway—Colorado, USA
Southwest Colorado’s Million Dollar Highway is, for much of its length, an idyllic, breathtakingly beautiful alpine road that connects Durango to Ouray via three 10,000-plus-foot mountain passes. But the 12 miles south of Ouray—particularly for Durango-bound drivers, who are exposed to the unprotected cliffsides—are steep, twisting and completely unforgiving of driver error. Originally hand-carved by Russian immigrant Otto Mears in the 1880s, the modern highway remains open through the slip-and-slide snowy months (pictured). As the locals say, though, you’d have to “pay me a million dollars” to drive that stretch in the snow.