Scenic Byway 12 —Utah.

Utah SR-12 is consistently ranked the most scenic highway in America. From Bryce Canyon's hoodoos it weaves over the Hogsback — a ridge so narrow you can see canyon walls dropping 1,000 feet on both sides simultaneously — then descends into the emerald pockets of Grand Staircase-Escalante before climbing to Boulder Mountain and the Aquarius Plateau at 9,600 ft. 120 miles of non-stop revelation.