AP PHOTOS: The National Park Service celebrates 100 years
The agency's reach stretches coast to coast, from Acadia on the Atlantic to the Channel Islands in the Pacific.
Centennial events scheduled for Aug. 25, 2016, include free mule-drawn boat rides at C&O Canal National Historical Park in Maryland, creation of a giant, living version of the park service emblem in Washington, D.C., a naturalization ceremony on the South Rim of the Grand Canyon and an outdoor concert at Yellowstone National Park.