Swiss International & Air Berlin airlines, Zurich airport, 29/07/2016. https://www.rawpixel.com/image/6112665/photo-image-public-domain-technology-skyFree Image from public domain licenseCapture of the gentle dusk in the morning on the shore of a beach. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287392/free-photo-image-coast-architecture-beach-images-picturesFree Image from public domain licenseLate evening capture near the beach of East Wenatchee, United States as the city settles for the night. Original public… https://www.rawpixel.com/image/3294345/free-photo-image-cc0-cloud-pictures-images-countrysideFree Image from public domain licenseAirbus G-EZFV - A319-111 - EasyJet, Aéroport de Bordeaux-Merignac, 10/07/2018. https://www.rawpixel.com/image/6112060/photo-image-public-domain-technology-skyFree Image from public domain licenseSky glider in sky, location unknown, January 13, 2016. View public domain image source here https://www.rawpixel.com/image/6113032/photo-image-public-domain-sky-freeFree Image from public domain licenseFree School, Thetford, Suffolk: doorway. Etching by J. Greig, 1818, after J.S. Cotman. https://www.rawpixel.com/image/14001447/image-cartoon-person-artFree Image from public domain license