San Bernardino, California. A sign on a freight car of the Delaware, Lackawanna and Western Railroad. Sourced from the… https://www.rawpixel.com/image/12292337/photo-image-public-domain-architecture-numberFree Image from public domain licenseRailroad station of the D.& R.G.W. Railroad at Ouray, Colorado. This narrow gauge line formerly had passenger service but… https://www.rawpixel.com/image/12149096/image-plant-person-artFree Image from public domain licenseStriking miners, Scotts Run, West Virginia. Sourced from the Library of Congress. https://www.rawpixel.com/image/12256323/photo-image-person-public-domain-manFree Image from public domain license[Untitled photo, possibly related to: Needles, California. A general view of the Atchison, Topeka, and Santa Fe Railroad… https://www.rawpixel.com/image/12292993/photo-image-sky-public-domain-architectureFree Image from public domain license[Untitled photo, possibly related to: Coal cars in railroad yard at Williamson, West Virginia]. Sourced from the Library of… https://www.rawpixel.com/image/12256476/photo-image-mountain-public-domain-landscapeFree Image from public domain licenseChicago, Illinois. Car checker writing instructions in chalk for special handling of cars going over the hump at a Chicago… https://www.rawpixel.com/image/12289930/photo-image-face-person-public-domainFree Image from public domain licenseSan Bernardino, California. An Union Pacific Railroad freight car. Sourced from the Library of Congress. https://www.rawpixel.com/image/12294121/photo-image-sky-public-domain-architectureFree Image from public domain license