Former colliery headstocks at dawn, Pleasley, Derbyshire, England, United Kingdom, Europe

Zollverein World Heritage Site, Essen, Ruhrgebiet, North Rhine-Westphalia, Germany, Europe

Former Osterfeld colliery, Oberhausen - Osterfeld, Ruhrgebiet, North Rhine-Westphalia, Germany, Europe

Yellow balloon, Schachtzeichen, mine shaft signs, Ruhr 2010, art installation, head frame of pit XII, Zeche Zollverein, former colliery, UNESCO World Heritage Site, Essen, Ruhr area, North Rhine-Westfalia, Germany, Europe

Former Nordstern colliery, shaft tower, Nordstern Park, Gelsenkirchen, North Rhine-Westphalia, Germany, Europe

Headframe of pit XII, Zeche Zollverein, former colliery, UNESCO World Heritage Site, Essen, Ruhr area, North Rhine-Westfalia, Germany, Europe

Hammerhead tower of the former Erin colliery, Castrop-Rauxel, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Aerial view, former colliery site, industrial estate, LEG, Landesentwicklungsgesellschaft, state development corporation, Alsdorf, North Rhine-Westphalia, Germany, Europe

Aerial photo, former Zeche Koenigsborn colliery, Altenboegge, Boenen, LEG Project, Ruhr area, North Rhine-Westphalia, Germany, Europe

Steigerhaus mine building and shaft tower of the former colliery and coking plant Osterfeld, now Olga-Park amusement park, Oberhausen, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Winding tower of the former Erin Colliery, industrial monument, Castrop-Rauxel, Ruhr Area, North Rhine-Westphalia, Germany, Europe

On the stairs of former coal washing plant in the colliery Zeche Zollverein, now Ruhr Museum, UNESCO World Cultural Heritage, Essen, North Rhine-Westphalia, Germany, Europe

On the stairs of former coal washing plant in the colliery Zeche Zollverein, now Ruhr Museum, UNESCO World Cultural Heritage, Essen, North Rhine-Westphalia, Germany, Europe

Aerial view, Maxipark, a recreational area, Zechenkaue, former colliery, Hamm, Ruhr area, North Rhine-Westphalia, Germany, Europe

Schachtzeichen project, mine shaft signs, European Capital of Culture, Ruhr 2010, winding tower of former colliery Koenigsborn III-IV, Boenen, Ruhr Area, North Rhine-Westphalia, Deutschland, Europe

Aerial view, former site of Schacht Franz, colliery, BMX exercise area, Herringen, Hamm, Ruhr Area, North Rhine-Westphalia, Germany, Europe