Images from Ken Burns's latest documentary

As revealed in The National Parks: America's Best Idea, a six-part, 12-hour film by Ken Burns and Dayton Duncan, Theodore Roosevelt did more for the national park idea than any other president in history. During a cross-country trip in 1903, he spent three nights camping alone in Yosemite with the other great champion of the parks, mountain prophet John Muir, who enlisted Roosevelt into making Yosemite Valley part of a larger national park. Pictured: Theodore Roosevelt and John Muir, Yosemite National Park, 1903.
Credit: Library of Congress, Prints and Photographs Division.
READ: Holy landscapes! Ken Burns worships America’s spiritual resource. By Clif Garboden.
LISTEN:Clif Garboden's interview with Ken Burns.