travel germany route of industrial culture in the ruhr area

architecture attraction block building business coal coalmine coking colliery cultural culture destinations dortmund double engineering essen europe factory famous german germany heavy heritage industrial industry interest landmark mine mineshaft mining monument museum north plant point rhinewestphalia route ruhr ruhrgebiet ruhrkohle shaft sightseeing state tourism travel underground unesco vintage westphalian work world zeche zollern zollverein