National Parks and Monuments
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
Collections:
Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...dark-colored walls, which are always in shadow; designated a national park in 1999...valleys and gorges; whitewater boating. Glen Canyon RA Ariz., Utah 1958 1,254,306 (507,816) Lake Powell, formed by the Glen Canyon Dam . Golden Gate RA W Calif. 1972...