Why was Auschwitz not destroyed by the Nazis to hide evidence, but camps like Treblinka and Westerbork were?

Question

Why was Auschwitz not destroyed by the Nazis to hide evidence, but camps like Treblinka and Westerbork were?

In: 151

Answer 1

A lot of it was. The gas chambers at Auschwitz, for example, are postwar reconstructions, not the original. The Nazis demolished most of the Auschwitz complex, and destroyed all the records they could.