I have done the 9/11 memorial, Belsen, Dachau and Auschwitz and all serve as a poignant indicator as how horrible the human race can be. Each was a moving and educational experience with Auschwitz the stand out 'memory' as I find it fascinating that a 'Death Factory' of such extent can run by 'people' that were not prehistoric but the age of many of our Grandparents. I would suggest if you do visit to read a few books on the camp before you go.