Established in 1872, Yellowstone National Park is America's first national park. Located in Wyoming, Montana, and Idaho, it is home to a large variety of wildlife including grizzly bears, wolves, bison, and elk. Preserved within Yellowstone National Park are Old Faithful and a collection of the world's most extraordinary geysers and hot springs, and the Grand Canyon of the Yellowstone. National Parks was an American Idea. If they hadn't been established, there would be no buffalo, no sequoia trees, no redwood trees or wolves left in America. John Muir could be considered the father of conservation of out National treasures. He was instrumental in the saving of Yosemite. At first, Yosemite was a State Park, later to become a National Park.