500 ct puzzle. In 2016, the National Park Service celebrated its 100th anniversary of the National Park System. Since its inception, more than sixty major parks have been established and maintained. After five years of researching, sketching, traveling, and designing, Nashville's Anderson Design Group, has put together a comprehensive collection of poster designs for each of the 62 major national parks. This commemorative print not only showcases an incredible illustrative range in color, angle, and lighting technique, it also celebrates the centennial of the National Park Service, an organization committed to preserving the very best of America.