The Yellowstone National Park is located in the United States, northwest Wyoming. A small portion of the park is the neighboring states of Idaho and Montana. Established in 1872, Yellowstone is the oldest national park in the world. It stretches over 8983 km away. It is the second largest national park in the United States. Yellowstone is famous for its geothermal features and contains two-thirds of the world’s geysers and hot springs. One of the iconic figures of the park is the second largest in the world after the Strokkur geyser that is located in Iceland. The park is also home to many large mammals such as black bears, grizzly bears, coyotes, wolves, elk, deer or wild herds of bison and elk. It is the heart of a vast natural habitat preserved, one of the last relatively intact ecosystems in temperate zones. Among the various ecosystems of the park is the subalpine forest is dominant. It is on the list of Biosphere Reserves since 1976. It receives annually visit about three million people, making it one of the busiest American parks.