https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13970683
Ditch, two months after grass burning; Panama Canal construction work. Photograph, 1910.
Ditch, two months after grass burning; Panama Canal construction work. Photograph, 1910.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use