Steam Tunnel One of the many exposed steam tunnels, unearthed by erosion and broken into by farm tractors and bored kids. Related Similar Images ...based on the tags: circles, tunnels... The mostly-empty distilling room is easy to spot from the outside because of the distinctive round window. Ben. One thing that struck me as a midwesterner in the South was the vines. They seem to be able to completely cover a building when left alone for a few decades. The mill was powered, in part, by water flowing through turbines under it. After the flow worked the industrial heart of the flour mill, it was exit to the Mississippi here. The workshop sat below the main working floor and had serious power going to it. A place to turn mine carts into different areas of the shops. A long tunnel stretches toward the Mississippi. Was this the route Model Ts took on their way to waiting barges? Scrappers tried to take this steel pulley out of Fisher, but it proved too heavy. The east portal, looking toward Nopeming Junction and away from the US Steel ruins and Duluth’s ore docks.