You are totally right, I wrote the article by memory and neglected to look again at the Rother book. If you are in the cities of the Ruhrgebiet and North Rhine Westfalia, you can really get away from the urban landscape by coming to places like this. I would also include Kettwig (near Essen) and Hattingen (near Bochum) as wonderful time capsules of beauty, away from the urban buzz of the cities of Essen and Bochum themselves.
Earlier, I replied to one poster that the private plane reviews would be coming up soon, but in fact they will begin at chapter 16...which is not so far away now!