Where is out-with located?

Out-with is a fictional location from the novel "The Boy in the Striped Pyjamas" by John Boyne. It refers to a concentration camp during World War II, specifically Auschwitz, where the story's protagonist, Bruno, inadvertently discovers the stark realities of the Holocaust. The term "out-with" is used by Bruno to describe the camp, reflecting his innocent misunderstanding of the situation.