A river in Yellowstone National Park on a gray winter day. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287536/free-photo-image-abies-cc0-cloud-pictures-imagesFree Image from public domain licenseView from Glacier Point on granite rocks in Yosemite Valley. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3291785/free-photo-image-abies-adventure-aerial-viewFree Image from public domain licenseThe Buffalo Fire burns through mixed sagebrush and grasses at Slough Creek by Neal Herbert. Original public domain image… https://www.rawpixel.com/image/4038676/photo-image-tree-plant-smokeFree Image from public domain licenseA U.S. Marine with the 2nd Battalion, 6th Marine Regiment, 2nd Marine Division engages targets during an assault support… https://www.rawpixel.com/image/3318535/free-photo-image-america-american-flag-arizonaFree Image from public domain license[Untitled photo, possibly related to: Orchards of Hood River Valley, Oregon, with Mount Hood in the background] by Russell… https://www.rawpixel.com/image/12144498/image-background-plant-artFree Image from public domain licenseChromatic Pool; Upper Geyser Basinby Matt Poyner. Original public domain image from Flickr https://www.rawpixel.com/image/4038827/photo-image-tree-ocean-plantFree Image from public domain licenseUndulating hills covered with brown grass and green bushes. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3288411/free-photo-image-briones-cc0-cloud-pictures-imagesFree Image from public domain licenseSilverton, Colorado lies in a valley at 9400 feet elevation. This has been a center for mining and milling operations and… https://www.rawpixel.com/image/12150391/image-cloud-plant-artFree Image from public domain licenseSacramento Pit copper mine at Bisbee, Arizona. This is a pit 435 feet deep. In 1911 a shaft was sunk into the slopes of the… https://www.rawpixel.com/image/12150259/image-art-sky-vintageFree Image from public domain licenseTobacco lands after the Connecticut River had subsided near Hatfield, Massachusetts. Sourced from the Library of Congress. https://www.rawpixel.com/image/12257955/photo-image-sky-beach-woodFree Image from public domain licenseIrrigation water reservoir of FSA (Farm Security Administration) clients. Washington County, Utah by Russell Lee https://www.rawpixel.com/image/12150552/image-plant-person-artFree Image from public domain licenseMountain valley near Telluride showing gold mill and Bridal Veil Falls and road winding around mountain up to the mine. San… https://www.rawpixel.com/image/12150353/image-plant-art-vintageFree Image from public domain licenseSnowstorm over the mountains in Socorro County, New Mexico. Snow in the mountains is an important source of water for the… https://www.rawpixel.com/image/12147982/image-cloud-art-skyFree Image from public domain license