Hot Metal Trench The working end of the blast furnace, where molten metal would flow like lava out of the furnace… a process called ‘tapping’. Similar Images ...based on the tags: circles, cranes, ditches, furnaces, graffiti, machinery, pipes... Often the quickest way to move between buildings was to take the roof. The inside of the complex was so maze-like, I don’t know how I would have found my way around. Delmar #4 is like two elevators in one, in capacity and design. A closeup of one of the winding machines that found itself under a leaky section of roof. The office building was fancy compared to the utilitarian factory behind it. My favorite part was the logo crown. I really liked the bulky pillars on this outer-ring cottage. Observing War City in the midst of an electric storm. This photo is lit almost entirely by lightning. The coal extractor swings back and forth, ripping coal from the ground and throwing it on a conveyor belt to be burned a few miles away. The spectacular, if precarious, view of downtown Minneapolis from the roof of ADM Annex 4. Note the great messages left by various graffiti artists who made it to the spot. The end of the heating line allowed glass to cool slowly, and thus be stronger.