:: The city on the site now called Cahokia Mounds, in the Mississippi valley, had 30 000 inhabitants at its height, and lasted for several hundred years .-- talk ) 00 : 17, 30 January 2012 ( UTC)
32.
They are : Mesa Verde National Park, Colorado, and Yellowstone National Park, Wyoming / Idaho / Montana ( designated in 1978 ); Everglades National Park, Florida, Grand Canyon National Park, Arizona, and Independence Hall, Pennsylvania ( 1979 ); Redwood National Park, California ( 1980 ); Mammoth Cave National Park, Kentucky, and Olympic National Park, Washington State ( 1981 ); Cahokia Mounds State Historic Site, Illinois ( 1982 ); Great Smoky Mountains National Park, North Carolina / Tennessee, and San Juan National Historic Site and La Fortaleza, Puerto Rico ( 1983 ); the Statue of Liberty, New York, and Yosemite National Park, California ( 1984 ); Chaco Culture National Historic Park, New Mexico, Hawaii Volcanoes National Park, including Mauna Loa, Hawaii, and Monticello and the University of Virginia, Charlottesville, Va . ( 1987 ); Pueblo de Taos, New Mexico ( 1992 ); and Carlsbad Caverns National Park, New Mexico ( 1995 ).
