A color postcard showing the Tioga Mine, a large open-pit iron ore mine located near Grand Rapids, Minnesota. The image captures the expansive, terraced excavation site with deep earth cuts and reddish soil, surrounded by forested hills. Massive trucks and excavation equipment are visible hauling and digging ore across the site. The printed caption on the back reads: "TIOGA MINE – Located near Grand Rapids, Minnesota. The mining of iron ore is one of Minnesota’s leading industries." Published by Gallagher’s Studio of Photography, Duluth, Minn.