2. U.S. 191, Jackson, WY to Yellowstone National Park, WY
U.S. 191 stretches from the Canadian border down to Douglas, Arizona. The entire route offers a staggering variety of natural beauty, but this chunk in particular is something special. This small stretch of 191 takes you past the unbelievable majesty of Grand Teton and Jackson Lake on the way to Yellowstone's south entrance. You'll not only see majestic mountains, but you'll catch a variety of wildlife, including bison, elk, and bears.