Yellowstone National Park, Ranger Naturalist Service (1938) vintage poster by C. Don Powell. Original public domain image… https://www.rawpixel.com/image/8628558/image-art-public-domain-blueFree Image from public domain licenseLandscape grassland outdoors nature. https://www.rawpixel.com/image/12231264/image-background-cloud-plantView licenseGeography: the Grand Canyon, Yellowstone Park. Coloured lithograph after T.H. Thomas. https://www.rawpixel.com/image/13967495/image-art-mountain-public-domainFree Image from public domain licenseThe Great Blue Spring of the Lower Geyser basin, Yellowstone National Park. Colour lithograph by L. Prang after T. Moran. https://www.rawpixel.com/image/13955114/image-cloud-person-artFree Image from public domain licenseTower Falls and and sulphur mountain, Yellowstone National Park. Colour lithograph by L. Prang after T. Moran, 1874. https://www.rawpixel.com/image/13968426/image-cloud-plant-personFree Image from public domain licenseLower Yellowstone mountain range, Wyoming. Colour lithograph by L. Prang after T. Moran, 1874. https://www.rawpixel.com/image/13966998/image-plant-tree-artFree Image from public domain licenseYellowstone National Park, Ranger Naturalist Service poster. Remixed by rawpixel. https://www.rawpixel.com/image/8647541/image-art-vintage-illustration-blueView licenseHot springs of Gardiner's River, Yellowstone National Park. Colour lithograph by L. Prang after T. Moran, 1875. https://www.rawpixel.com/image/13952666/image-person-art-fireFree Image from public domain licenseGrand Prismatic Spring outdoors yellowstone national park tranquility. https://www.rawpixel.com/image/13289022/grand-prismatic-spring-outdoors-yellowstone-national-park-tranquilityView licenseGrand Prismatic Spring yellowstone national park tranquility reflection. https://www.rawpixel.com/image/13289026/grand-prismatic-spring-yellowstone-national-park-tranquility-reflectionView licenseYellowstone national park wilderness landscape outdoors. https://www.rawpixel.com/image/13289034/yellowstone-national-park-wilderness-landscape-outdoorsView licenseHeadwaters of the Gallatin County, Yellowstone National Park, Montana by William Henry Jackson https://www.rawpixel.com/image/14281973/image-water-public-domain-natureFree Image from public domain licenseLispenard Stewart party, #6 - 5th Ave., N.Y. with trophies by old cedar tree, Mammoth Hot Springs, Yellowstone National Park… https://www.rawpixel.com/image/14278137/image-face-trophies-peopleFree Image from public domain license