Visited Dachau twice. The property is maintained by a convent of Nuns (or was when I visited) To tell the truth, I found the compound so sanitized that it was difficult to imagine the crimes that occurred there.
http://scholarcommons.usf.edu/hgstud_oh/
This link has a bunch of oral interviews with people. A relative of mine was interviewed in 2008 : Robert Duoos.
In his he talks about going into a camp a few days after it was liberated. In the medical offices saw lamp shades of human skin, a full body sliced in half, the piles of bodies, etc.