the preserved ruins from the upper part of a crematory

water vintage tourist solution ruins rudolf road red prisoners pound poland plates old nazi museum landmark krakow konzentrationslager hitler himmler heinrich guard germany german genocide gas final extermination europe defense death criminal crematory cracow cracovia concentration complex commemorative cell camp buildings building bricks board blocks block birkenau barracks barrack barbwire barbed auschwitzbirkenau auschwitz auchwitzbirkenau ash architecture annihilation auschwitz poland nazis watch tower genocide nazi camp wire electrified holocaust murder killing compound kill