https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/582489
The Argo Gold Mine and Mill, a former mining and milling property consisting of a gold mine and gold mill in Idaho Springs, Colorado, built at the entrance of the Argo Tunnel.
The tunnel was built between 1893 and 1910 to drain the gold mines in Virginia Canyon, Gilpin Gulch, Russell Gulch, Quartz Hill, Nevadaville, and Central City and allow easier ore removal. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by rawpixel.
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