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Yellowstone National Park is the world's national park. It is in the state of Wyoming, the USA. The of Yellowstone National Park is about 9,000 km2. There lakes, canyons, rivers and mountains in it.
Yellowstone National Park is famous its wild (野生的) animals and its many geological phenomena (地理现象) , like hot springs, canyons and . The Yellowstone Lake is in the center of the park it is the beginning of the Mississippi.
Every year, of people from all over the world go to Yellowstone National Park. They can the wonderful geological phenomena. They can go hiking, camping, boating, fishing and sightseeing there.