Demolished Duluth Works, Brick 2 Bricks from the demolished buildings. Similar Images ...based on the tags: rocks... 300 tea lights illuminate what Greg Brick calls the Rotunda, under the brew house proper, which was part of Christopher Stahlmann’s natural cave. In the mountainside are a number of air shafts, indicating where the tunnels traced under the rocky surface. Looking into the mouth of the hopper which mine carts dumped into at the top of the Concentrator. The right portal used to go straight into the basement of the hotel, judging from the ruins. Check that waterfall! The city has taken steps to prevent the curious and the desperate from going into the elevators, including piling rocks against the doors and windows. Modern ruins of the Gilman-Belden tram… Some of the workings inside the ruins of the Gold Prince Mill are still obvious, such as this steel ore chute over that used to feed a floatation tank. The last tailings on a broken conveyor belt.