The Last Days is a very powerful documentary focusing on 5 Hungarians who survived the Holocaust and their experiences during that time. You learn about their lives before/during/after time spent in concentration camps at the end of WWII when Hitler was doing his best to eradicate as many Jews as possible.
The most moving part of the film is when the cameras follow the survivors, along with their families, back to the concentration campus for the first time since the end of the war. Words can't begin to describe the feelings that these people and their families went through at that moment when all of those horrible memories hit them.
My recommendation: See it.