The only remaining intact gas chamber and crematorium: Krematorium I, Auschwitz. photo 1979
The Krankenbau or camp hospital courtyard. Prisoners came to the hospital seeking, if nothing else, a brief respite from the killing work. Those too ill to work were killed by phenol injection to the heart, or sent to the gas. For a photo and survivor art showing these prisoners being whipped onto a truck for transport to the gas chamber, see http://remember.org/then-and-now/tn05.html edit
Urbaniak, the Birkenau caretaker, 1979.