High Quality Content by WIKIPEDIA articles! Death Valley National Park is a national park in the U.S. states of California and Nevada located east of the Sierra Nevada in the arid Great Basin of the United States. The park protects the northwest corner of the Mojave Desert and contains a diverse desert environment of salt-flats, sand dunes, badlands, valleys, canyons, and mountains. It is the largest national park in the lower 48 states and has been declared an International Biosphere Reserve. Death Valley National Park is visited annually by more than 825,000 visitors who come to see its diverse geologic features, desert wildlife, historic sites, scenery, and clear night skies.