Silhouette of a person standing proudly atop a hill at sunrise. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3294199/free-photo-image-asphalt-cc0-countrysideFree Image from public domain licenseStacks of wheat cut with binder and ready to be threshed on a farm in Red River Valley. North Dakota. Sourced from the… https://www.rawpixel.com/image/12331798/image-plant-grass-skyFree Image from public domain licenseWoman standing by the riverside in the Highlands https://www.rawpixel.com/image/529374/premium-photo-image-adult-alone-backView licenseThe sun rising along the horizon with a dark sky and silhouette of the skyline. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3289516/free-photo-image-adventure-cc0-countrysideFree Image from public domain licenseNational Library of Medicine at night. Glowing facade of the National Library of Medicine. Original public domain image from… https://www.rawpixel.com/image/8786597/photo-image-light-books-sunsetFree Image from public domain licenseSchleswig-Holstein War: an ambulance arriving at a battlefield in Düppel 18 April 1864. Lithograph by W. Funke, 1864. https://www.rawpixel.com/image/14014568/image-horse-person-artFree Image from public domain licenseBoston Harbor - Looking Toward Squantum. Long Island Bridge in Distance 05/1973. Photographer: Halberstadt, Ernst, 1910… https://www.rawpixel.com/image/8803153/photo-image-sunset-person-skyFree Image from public domain licenseon a sunny and cold afternoon in December. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3371957/free-photo-image-abies-cc0-coniferFree Image from public domain licenseValley with a River and a Town with Four Towers (c. 1626 - c. 1627) by Hercules Segers and Hercules Segers https://www.rawpixel.com/image/13781606/image-paper-frame-artFree Image from public domain licenseU.S. Sailors stand in formation on an aircraft elevator during a burial at sea ceremony aboard the aircraft carrier USS… https://www.rawpixel.com/image/8728360/photo-image-sunset-sky-public-domainFree Image from public domain licenseRays of sunshine streaming out from behind a cloud at sunset. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292155/free-photo-image-cc0-cloud-creative-commonsFree Image from public domain licenseSilhouettes of two people wading through the sea at twilight. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3293940/free-photo-image-adventure-azure-sky-cc0Free Image from public domain licenseBlackburn, United Kingdom. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292195/free-photo-image-cc0-creative-commonsFree Image from public domain licenseU.S. Sailors prepare to fire a .50-caliber machine gun during a night-time live-fire exercise on the fantail of the aircraft… https://www.rawpixel.com/image/3318055/free-photo-image-aircraft-airplane-architectureFree Image from public domain license