Filmed over more than six years at some of nature's most spectacular locales, this six-part, 12 hour documentary series by Ken Burns and his longtime colleague Dayton Duncan present the history of America's national parks - an epic story of people rich and poor, famous and unknown, soldiers and scientists, natives and newcomers, idealists, artists and entrepreneurs who were willing to devote themselves to saving some precious portion of the land they loved and, in doing so, reminded their fellow citizens of the full meaning of democracy. Blu-Ray Edition.