Yosemite National Park: Not just a great Valley... but a shrine to human foresight, strength of granite, power of glaciers, the persistence of life, and the tranquility of the High Sierra. Yosemite National Park, one of the first wilderness parks in the United States, is best known for its waterfalls, but within its nearly 1,200 square miles, you can find deep valleys, grand meadows, ancient giant sequoias, a vast wilderness area, and much more.