Can somebody suggest me any movies that take place within a concentration camp?

So I'm more specifically looking for something within this setting rather than a Holocaust movie in general. So two movies that immediately come to mind for me are "The Boy in the Striped Pajamas" and "The Champion" on Netflix are good examples of what I'm talking about. Just movies depicting there sheer darkness and horror of what was going on in the concentration camps. Thank you for any and all suggestions!