Filmmaker Ken Burns on 100 years of the National Park Service by KCRW published on 2016-08-24T23:47:03Z The National Park Service is now 100 years old. On August 25th, 1916, President Woodrow Wilson signed the Organic Act, formally establishing the agency within the Department of the Interior. Now, it manages 59 U.S. national parks and numerous national monuments. Filmmaker Ken Burns spent ten years exploring and filming these parks, for his documentary series, The National Parks: America’s Best Idea. KCRW’s Larry Perel spoke with Burns about how, 100 years later, the NPS is just as relevant as ever.