I checked and they are doing the River Rouge factory tours. These are a bit of a local legend in Detroit. They did them up until 1980 and then stopped. They started again in 2004. When I did them a few times, in the 60s they were fascinating. They are a tour of what was at the time, Fords biggest factory. They were making Mustangs and Fairlanes there when I took the tours. But you could see the whole factory complex, steel fabrication, power generation, assembly of cars and the works back then. Not sure exactly what is included now, but if you want to see the Rust belt, this is where it starts.