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Throughout the United States of America there is a large amount of National Parks. These parks are operated by the National Park Service and can only be established by an act of the US Congress. Yellowstone was the first natural area to be designated a National park in 1872 by President Ulysses S. Grant; since then a plethora of other natural have joined the list, and the USA currently boasts 59 National Parks. To qualify as a National Park, the natural area must meet certain criteria such as providing an outstanding region of natural beauty, an unusual ecosystem or a
