A green plant with large leaves under a worn-out white brick wall. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3301570/free-photo-image-wall-cc0-creative-commonsFree Image from public domain licenseLugo, Spain. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292394/free-photo-image-nature-pebbles-cc0-creative-commonsFree Image from public domain licenseBlack and white shot of geometric square tile pattern in Katowice. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287517/free-photo-image-cc0-creative-commonsFree Image from public domain licenseA weathered wooden wall with a small plaque with the number zero. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289761/free-photo-image-cc0-creative-commonsFree Image from public domain licenseA person walking through a maze made out of rocks by the side of the beach. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3298973/free-photo-image-cc0-creative-commonsFree Image from public domain licenseA large sphere covered with triangle-shaped tiles. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3299216/free-photo-image-architecture-building-cc0Free Image from public domain licenseA block brick wall painted light gray and red. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289002/free-photo-image-brick-buildings-cc0Free Image from public domain licenseClose up of the archivolte of the romanesque church "our Lady" in Avy, Charente-Maritime, France. Original public domain… https://www.rawpixel.com/image/3340720/free-photo-image-apse-arch-archaeologyFree Image from public domain licenseA black and white crosswalk in the street. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3300865/free-photo-image-zebra-crossing-cross-road-asphaltFree Image from public domain licensePart of a coffered wooden ceiling in the "Emperors Chamber" of Alhambra of Granada, Spain. https://www.rawpixel.com/image/3340638/free-photo-image-cc0-pattern-tabletop-floor-tilesFree Image from public domain licensePink rows of mailboxes in front of pink cement architecture in Ocean City. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3287537/free-photo-image-cc0-creative-commonsFree Image from public domain licenseRegular glass plates in the facade of an office building in Madrid. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289961/free-photo-image-towel-texture-cc0-creative-commonsFree Image from public domain licenseMuggenhof U-Bahn Station. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295380/free-photo-image-art-cc0-concreteFree Image from public domain licensePaddlewheel Steamboat On Ohio River, May 1972. Photographer: Strode, William. Original public domain image from Flickr https://www.rawpixel.com/image/8799654/photo-image-public-domain-travelFree Image from public domain license