Website for "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." Features material about history, animals and plants, hydrothermal activity, park management, a Yellowstone animal alphabet book for children, and more. From the National Park Service (NPS).