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The National Natural Landmarks ( NNL) Program recognizes and encourages the conservation of outstanding examples of the natural history of the United States. [ 1] It is the only national natural areas program that identifies and recognizes the best examples of biological and geological features in both public and private ownership.
Two of the NPS's national monuments, Grand Canyon–Parashant and Avi Kwa Ame, are not official units because they overlap with Lake Mead National Recreation Area. Management practices vary across agencies and sites according to their missions, the size or type of protected place, and legal authorization.
Of the 26 sites, 13 are cultural, 12 are natural, and one, Papahānaumokuākea, is mixed, listed for both cultural and natural properties. [3] One site is currently listed as endangered: Everglades National Park was listed in 2010 due to deterioration of its aquatic ecosystems. The site had also been listed as endangered between 1993 and 2007.
The largest national park is Wrangell–St. Elias in Alaska: at over 8 million acres (32,375 km 2 ), it is larger than each of the nine smallest states. The next three largest parks are also in Alaska. The smallest park is Gateway Arch National Park, Missouri, at 192.83 acres (0.7804 km 2 ).
This is a list of National Historic Landmarks in U.S. commonwealths and territories, associated states, and foreign states. Included are lists of National Historic Landmarks (NHLs) and of National Park Service administered areas in U.S. Commonwealths and territories, U.S.-associated states, and in the foreign state of Morocco. There are 23 NHLs ...
Click on a state to see a list of the National Historic Landmarks in that state. The United States National Historic Landmark Program is designed to recognize and honor the nation's cultural and historical heritage. The program was formally inaugurated with a series of listings on October 9, 1960; as of August 21, 2020, there are 2,597 ...
38.3525°N 77.132778°W. / 38.3525; -77.132778 ( Caledon State Park) King George. State (state park) One of the best examples of oak - tulip poplar -dominated virgin upland forest in the country. 3. Charles C. Steirly Natural Area. 1974. 37°03′03″N 76°58′52″W / .
Monroe. Municipal. Contains a pristine stand of beech-maple forest, a climax forest dominated by the American beech and sugar maple which covered most of the Northeastern United States when it was settled. 12. Hook Mountain and Nyack Beach State Park. April 1980.