National Geographic : 1933 Jul
Official photograph, U.S.Army Air Corps AN AERIAL VIEW REVEALS THE FULL GLORY OF LOWER YELLOWSTONE FALLS Here the Yellowstone River drops 308 feet into a canyon alive with color. Fumes from subterranean hot springs have worked ontherock formations to produce this painted effect. Yellowstone is the oldest, largest, and perhaps the best known of our national parks. Itsmore than 2,000,000 acres extend into three States, but are mainly in northwestern Wyoming. In the right background is a large resort hotel.