Red Light District
One day after I went to the Tiger & Turtle Magic Mountain Construction in Duisburg, I went out to the Miners Lamp at the burden dump Rheinpreußen in Moers which is located directly next to Duisburg and Krefeld. The big Miners Lamp on the top of the small hill is lighted red. It is a symbol of the (former) mining industry in the Ruhr area. I think you can actually go inside it during the day.
Have a great day everybody!