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THE NATIONAL PARKS: AMERICA'S BEST IDEA Filmmaker Ken Burns explores the history and splendor of, and the public passion for, America's national parks. The Scripture of Nature (1851-1890)
Sunday, September 27 In the first segment, the astonishing beauty of Yosemite Valley and the geyser wonderland of Yellowstone give birth to the radical idea of creating national parks for the enjoyment of everyone; John Muir becomes their eloquent defender.(CC, Stereo, HD)

http://www.pbs.org/nationalparks/