I visited Auschwitz
I was visiting Krakow and the main tourist things were visiting the salt mines or visiting Auschwitz. In hindsight I should have chosen the salt mines, because it was a bit depressing.
Things that stayed in my memory were a schizo American /pol/ tier black man who kept trying to convince the tour guide that holocaust wasn't real, and a Dutch guy who claimed to have eaten the best hot dog of his life in a shop outside Auschwitz and wouldn't stop talking about it.