https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12335452Edit ImageSaveSaveEditCropCustom TextThe Old 71 engine of the Colorado and Southern Railroad, which carried ore and passenger cars from Denver to "the richest square mile on earth". Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 917 px | 300 dpiLarge JPEG 3500 x 2675 px | 300 dpiBest Quality JPEG 13810 x 10556 px | 300 dpiTIFF 13810 x 10556 px | 300 dpi | 139.05 MBFree DownloadThe Old 71 engine of the Colorado and Southern Railroad, which carried ore and passenger cars from Denver to "the richest square mile on earth". Sourced from the Library of Congress.More