The Greater Yellowstone Ecosystem is a vast and diverse region located in the western United States, primarily encompassing parts of Wyoming, Montana, and Idaho. It includes the famous Yellowstone National Park, which was established in 1872 as the first national park in the world. The ecosystem is characterized by a variety of landscapes, including mountains, forests, rivers, and geothermal features. This area is home to a rich array of wildlife, such as grizzly bears, wolves, and bison. The ecosystem is one of the largest intact temperate ecosystems in the world, providing critical habitats for numerous species. Conservation efforts are ongoing to protect its unique biodiversity and natural resources.