21.9 miles: 0 hours, 22 minutes
Drive through the Navajo Indian Reservation, which envelops US 163 in Arizona. You may recognize the route’s red sandstone mesas as the backdrop to many western films. El Capitan, a giant monolith created from volcanic rock, forms a striking silhouette. Spiral rock formations, arches and buttes rise from Monument Valley Navajo Tribal Park’s Mystery Valley.