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The National Parks: America's Best Idea: The history of the U.S. National Parks system, including the initial ideas which led to the world's first national parks and the expansion of the system over 150 years.

Watch the full The National Parks: America's Best Idea Season 1 Episode 4 movie online at no cost in high-definition (HD) quality. No downloads needed—simply click to play and experience the excitement with English subtitles included for your convenience.