https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/429724![Zig-zag Passenger and Freight Train by an unknown artist. Original from Library of Congress. Digitally enhanced by rawpixel.](https://images.rawpixel.com/image_social_landscape/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGQxOS0xMDEwMi5qcGc.jpg)
![Zig-zag Passenger and Freight Train by an unknown artist. Original from Library of Congress. Digitally enhanced by rawpixel.](https://images.rawpixel.com/image_social_landscape/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGQxOS0xMDEwMi5qcGc.jpg)
Zig-zag Passenger and Freight Train by an unknown artist. Original from Library of Congress. Digitally enhanced by rawpixel.
Zig-zag Passenger and Freight Train by an unknown artist. Original from Library of Congress. Digitally enhanced by rawpixel.
Public DomainFree CC0 image for Personal and Business use