“Now, more than ever, we need to support these incredible natural treasures.” Since the establishment of Yellowstone National Park, in 1872, 58 more were created – symbols of some of the United States’ most beautiful and important natural resources. The parks are governed by the National Park Service, which celebrated its centennial last year. In commemoration of the NPS’ 100th birthday, a former National Geographic staff photographer, Jonathan Irish, and his wife, Stefanie Payne, embarked