https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/328261Edit ImageSaveSaveEditCropCustom TextIllustration of the underground tunneling machine - driving the machine ahead from Illustrated description of the Broadway underground railway (1872) by New York Parcel Dispatch Company.MorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 1001 px | 300 dpiLarge JPEG 1813 x 1513 px | 300 dpiTIFF 1813 x 1513 px | 300 dpi | 15.73 MBFree DownloadIllustration of the underground tunneling machine - driving the machine ahead from Illustrated description of the Broadway underground railway (1872) by New York Parcel Dispatch Company.More