Horrific. Went to Kracow 3 years ago, visited Auschwitz/Birkenau and it really brought it home; 6 million Jews, Russians, Poles, Romani, Homosexuals and political prisoners killed by the Nazis, 1.2 million at Auschwitz/Birkenau, numbers you read about in GCSE History. The numbers are staggering when you read them but when you see the mechanism for implementing the killing of human beings its heartbreaking. The setup and scale of the place for industrial killing was horrific, human abattoir. It was horrible but a place you need to see to comprehend rather than want to go.