Interstate highways allow for quick trips, but they also provide a gateway to some of the most amazing places you'll ever visit. Host David Yetman travels by foot, car, bike, and motorcycle to examine the caves of Kartchner Caverns State Park, the historic sites of Tombstone, the Sandhill Cranes of Sulphur Springs Valley and the "Wonderland of Rocks" in the Chiricahua Moutains.