I grew up near Auschwitz and there's a completely unremarkable field not far from the site of the camp, surrounded by fields and forest, there's a small gravestone near one of the trees and it just reads "on this site, remains of approximately 100k people are buried, please be respectful". Local farmers finding "bits" of human remains is a very common thing in the area unfortunately.

Just wanted to add to the point that the history is all around us, it's not neatly cordoned off and put in museums.