This screensaver will show you off the beautiful images of 2 famous national parks of USA - Yellowstone and Yosemite. Yellowsone park was the first of its kind, and is known for its wildlife and its many geothermal features, especially Old Faithful Geyser, one of the most popular features in the park. Yosemite park is internationally recognized for its spectacular granite cliffs, waterfalls, clear streams, Giant Sequoia groves, and biological diversity. Install this screensaver and enjoy the unusual rocky formations, stunning rich colors and wild nature of Yellowstone and Yosemite national parks.