Rheinorange is a sculpture erected in 1992 in Duisburg-Neuenkamp, Germany. It is located at the point where the Ruhr flows into the Rhine at 'Rheinkilometer 780', i.e. 780 km from the source of the Rhine. It was constructed from steel by the sculptor Lutz Fritsch from Köln.
It is 25 m tall, 7 m wide and 1 m thick, and weighs 83 tonnes. The cost was over 400.000 DM, which was donated by the Niederrhein IHK after a fund-raising initiative by the young entrepreneurs members. The name Rheinorange is actually a play on words. It sounds like Reinorange which is RAL 2004 in the RAL color standard.
Wikipedia https://en.wikipedia.org/wiki/Rhine_Orange
Address Duisburg 47059, Germany
Coordinates 51°26'57.588" N 6°43'20.023" E