Construction workers walk up scaffolding to their site. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283435/free-photo-image-construction-worker-ruralFree Image from public domain licensePresident Trump Departs a Snow Covered South Lawn in Marine OneMarine One lands on the snow-covered South Lawn of the White… https://www.rawpixel.com/image/4049159/photo-image-bird-animalFree Image from public domain licenseHeavy equipment excavating an area at Decker Coal Company, October 1979. Original public domain image from Flickr https://www.rawpixel.com/image/3335893/free-photo-image-cc0-coal-construction-craneFree Image from public domain licenseA man's reflection on a train's front buffer. Original public domain image from Flickr https://www.rawpixel.com/image/5803557/photo-image-public-domain-red-manFree Image from public domain licenseEroded sedimentary rocks in Bryce Canyon National Park, Utah, USA. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3338725/free-photo-image-art-canyon-cc0Free Image from public domain license