The Industrial Heritage Trail
The Industrial Heritage Trail (German: Route der Industriekultur) links tourist attractions related to the industrial heritage in the Ruhr area in Germany. It is a part of the European Route of Industrial Heritage.
The trail network connects museums and exhibitions that present the industrial revolution during the last 750 years in the Ruhr area. It includes 400 km of road network and about 700 km of bicycle tracks.
There are 52 main attractions on the trail.
In the category Panoramas are lots of spoil tips, e.g. here the Halde Rheinpreußen
The glass elephant in Hamm
...
Wikipedia