America's National Parks at 100

S1 E1: The National Park Service has been active for over a century preserving and protecting over 400 units across America, from the wild and natural to the man-made and historic. Take a tour through iconic Yellowstone and the Grand Canyon and discover smaller, hidden treasures throughout the country as we explore the agency's evolution over the last century. Through rarely-seen footage and stunning aerial views, we celebrate the sites and stories of the national landmarks that reflect the country's past, present, and future.