Zion National Park, UT
Plateau of Zion's East Rim,
copyright Zion National Park
Summer may bring bumper-to-bumper traffic to this popular national park, but make no mistake about it: Pedestrians rule at Zion. The park boasts more miles of walking trails than road. The river is fair game for hikers. Cars are no longer permitted on its scenic 7-mile drive -- you'll have to take the shuttle.
This is a walker's park, first and foremost. Those red rock cliffs towering 2,000 feet above the canyon floor may look formidable, but there's something in them for everyone -- from short, flat strolls to gut-busting treks.
So ditch the car, put on your hiking boots, and get ready to explore. Tip: By midday, most trails are basking in full sun, so start early. The scenery won't look nearly as spectacular through swollen, sunburned eyes.