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Mammoth Cave National Park

(Encyclopedia)Mammoth Cave National Park, 52,830 acres (21,396 hectares), central Kentucky, authorized 1926, est. 1941. Located in a hilly, forested region, it offers numerous outdoor activities. It is the site of ...

Manzanar National Historic Site

(Encyclopedia)Manzanar National Historic Site: see National Parks and Monuments (table)national parks and monuments (table). ...

Johnstown Flood National Memorial

(Encyclopedia)Johnstown Flood National Memorial: see Johnstown (2); National Parks and Monuments (table)national parks and monuments (table). ...

Kings Canyon National Park

(Encyclopedia)Kings Canyon National Park, 461,901 acres (187,070 hectares), E central California. Largely wilderness, the park features summits of the High Sierra and two enormous canyons on the Kings River. Genera...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Natchez National Historical Park

(Encyclopedia)Natchez National Historical Park: see National Parks and Monuments (table)national parks and monuments (table). ...

National Academy of Sciences

(Encyclopedia)National Academy of Sciences, with headquarters in Washington, D.C., a private organization of leading American scientists and engineers devoted to the furtherance of science and its use for the gener...

National Ballet of Canada

(Encyclopedia)National Ballet of Canada, the leading Canadian ballet company. Based in Toronto, it was founded (1951) by Celia Franca (1921–2007) and modeled on Sadler's Wells (now the Royal Ballet). Its repertoi...

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