Grand Canyon National Park, Arizona
Few people would probably be surprised to learn the immense, remote Grand Canyon National Park is a prime spot for stargazing. Once you get away from the lights of Grand Canyon Village and out onto the various trails along the canyon's north and south rims, the views are impressive. If the moon is in hiding, you can often see the Milky Way stretching across the star-studded sky, or maybe a meteor shower [sources: Sibal, Grand Canyon Lodges].
While there aren't any guided stargazing tours here, you can easily do it on your own. Just head out on a trail, away from the ponderosa pines, and look up. You can also grab a stargazing map from one of the gift shops for a little more guidance; free telescopes are provided at the Grand Canyon Visitor Centers and the Grand Canyon Lodge, too. Once a year, typically in June, there's a Grand Canyon Star Party [source: Sibal].
All of these resources are easily accessible from the park's Mather Campground and Trailer Village, located in Grand Canyon Village. The Desert View Campground is less developed, and lies 25 miles (40 kilometers) from the Village, while the North Rim Campground and Tuweep (aka Toroweap) are on the park's much-less-visited North Rim. The Tuweep site is primitive and remote, so stargazing may be a little better there [sources: National Park Service, National Park Service].