Explore legendary routes that pack plenty of scenery and few crowds. You've probably considered road tripping in spring or fall, when brilliant floral or foliage displays entice us to fill up the tank and take a drive. But in winter, when famed rock formations are frosted with snow and America's top national parks are crowd-free, you can experience the country's iconic routes with less traffic and reduced lodging rates. Of course, driving in winter comes with its own caveats.