Rippled patterns shaped by wind play upon the surface of sand at Great Sand Dunes National Park. Photo by Julie West.… https://www.rawpixel.com/image/4225020/photo-image-background-public-domain-natureFree Image from public domain licenseA storm brews over the sagebrush near Great Sand Dunes National Park and Preserve in Alamosa County, Colorado. Original… https://www.rawpixel.com/image/434507/free-photo-image-storm-weather-badFree Image from public domain licenseGrass mounds, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802875/photo-image-grass-mountain-natureFree Image from public domain license