another one ... (http://whc.unesco.org/pg.cfm?cid=246&id_state=169)
United States of America
Date of ratification of the Convention:
07 Dec 1973
Properties inscribed on the World Heritage List:
Cultural
Cahokia Mounds State Historic Site (1982)
Chaco Culture National Historical Park (1987)
Independence Hall (1979)
La Fortaleza and San Juan Historic Site in Puerto Rico (1983)
Mesa Verde (1978)
Monticello and the University of Virginia in Charlottesville (1987)
Pueblo de Taos (1992)
Statue of Liberty (1984)
Natural
Carlsbad Caverns National Park (1995)
Everglades National Park (1979)
Grand Canyon National Park (1979)
Great Smoky Mountains National Park (1983)
Hawaii Volcanoes National Park (1987)
Kluane/Wrangell-St. Elias/Glacier Bay/Tatshenshini-Alsek (1979)
Mammoth Cave National Park (1981)
Olympic National Park (1981)
Redwood National Park (1980)
Waterton Glacier International Peace Park (1995)
Yellowstone (1978)
Yosemite National Park (1984)