There are at least 50 national parks in the United States, and this video takes 65 minutes to explore 20 of them, from Acadia to Zion. The best known are featured: Yellowstone, with Old Faithful and 10,000 or so other geothermal features (making it the world"s largest geothermal site); Yosemite, with its El Capitan rock face, the largest block of granite on earth; and, of course, the Grand Canyon, one of the seven natural wonders of the world. But the video also explores some of America"s lesser-known gems, such as Montana"s Glacier National Park, with its Going-to-the-Sun Road, a 50-mile experience that takes the traveler from tundra to alpine vistas, with the lure of possible sightings of mountain goats and grizzlies along the way. From the Everglades in the East to the Redwoods in the West, this visual tour of the finest nature has to offer in the U.S. should inspire you to start checking out camper prices--or, at least, motel rates. --Kimberly Heinrichs