Whale tail in Sydney, Australia. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283600/free-photo-image-whale-swimmingFree Image from public domain licenseSydney Harbour Bridge.The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail… https://www.rawpixel.com/image/4022491/photo-image-city-buildingFree Image from public domain license