The gas chamber in Krema II at Auschwitz-Birkenau is nothing but ruins now. It was blown up by the Nazis, or by the Soviet liberators of Auschwitz, depending on what you believe. There are two sides to the story.
There are two well-known videos which tell two sides of the story of the gas chamber in Krema II at Auschwitz-Birkenau. Watch the two videos and decide for yourself which is true.