Thank you. It is funny how this one is less than ten meters from a well-travelled road and yet, unless you are paying attention, it fades into the forest. BTW - The road is a ledge above and behind it in that panoramic photo. You can't even see my car parked behind the furnace.
It is a large structure designed to create iron ingots. Check out my journal post [link] for a series of links that go into some of the history. Also, you can get a free card stock model kit to make one on this [link] .