Entry gate with sign Arbeit Macht Frei (work makes you free), Auschwitz Concentration Camp, UNESCO World Heritage Site, Oswiecim, near Krakow (Cracow), Poland, Europe

Entry gate with sign Arbeit Macht Frei (work makes you free), Auschwitz Concentration Camp, UNESCO World Heritage Site, Oswiecim, near Krakow (Cracow), Poland, Europe

Entrance gate with lettering Arbeit macht frei, Auschwitz Concentration Camp, UNESCO World Heritage Site, Makopolska, Poland, Europe

Entry gate with sign Arbeit Macht Frei (work makes you free), Auschwitz Concentration Camp, UNESCO World Heritage Site, Oswiecim, near Krakow (Cracow), Poland, Europe

Combined heat and power station Berlin Buch, Vattenfall, control of the chimney

Dachau Concentration Camp Memorial Site, Bavaria, Germany, Europe

Main gate with the 'Arbeit macht frei' slogan over it, Auschwitz Concentration Camp, Oswiecim, Malopolska, Poland

Main gate with the 'Arbeit macht frei' slogan over it, Auschwitz Concentration Camp, Oswiecim, Malopolska, Poland

Poland, Auschwitz-Birkenau State Museum, Auschwicz Concentration Camp, 'Arbeit Macht Frei' slogan above the entrance gate.