Assouan, the frontier town of Upper Egypt. by Francis Frith https://www.rawpixel.com/image/14286098/assouan-the-frontier-town-upper-egypt-francis-frithFree Image from public domain licenseNight Bridge Reflection. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3371375/free-photo-image-arch-arched-architectureFree Image from public domain licenseBlack and white shot of pier in distance with waves coming into shore. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295074/free-photo-image-cc0-creative-commonsFree Image from public domain licenseZürich, Switzerland. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298416/free-photo-image-advertisement-architecture-banisterFree Image from public domain licenseOcean water textures, aqua blue waves background free public domain CC0 photo https://www.rawpixel.com/image/5902996/photo-image-background-textures-public-domainFree Image from public domain licenseHeavy equipment loading logs onto truck, October 1973. Original public domain image from Flickr https://www.rawpixel.com/image/3335681/free-photo-image-bulldozer-cc0-creative-commonsFree Image from public domain licenseHeavenly abode; high above. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3371856/free-photo-image-abies-cc0-coniferFree Image from public domain licenseCarrizo Plain National Monument, Santa Margarita, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3302064/free-photo-image-blossom-cc0-countrysideFree Image from public domain licenseSomei-yoshino [i.e., Somei Yoshino] / K. Tsunoi.. Original from the Library of Congress. https://www.rawpixel.com/image/7636936/image-flower-watercolors-artFree Image from public domain licenseA smooth dark lake among green hills. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3300612/free-photo-image-abies-cc0-coastFree Image from public domain licenseYosemite Valley, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296837/free-photo-image-abies-cc0-coniferFree Image from public domain licenseAn aerial drone shot of a rocky ravine and soil in Lake Powell, Utah. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3293855/free-photo-image-aerial-view-art-cc0Free Image from public domain licenseEucalyptus leaves. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3301456/free-photo-image-acanthaceae-annonaceae-blossomFree Image from public domain licenseThe view stretches on and one as the sun and shadows hang over this sprawling canyon. https://www.rawpixel.com/image/5974849/photo-image-public-domain-shadow-natureFree Image from public domain licenseNorthern CopperheadPhoto by Grayson Smith/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4029127/photo-image-nature-snakeFree Image from public domain license