The only two I could remember is Auschwitz and Ravensbruck. Most of them I can't pronounce let along remember them. I think Auschwitz was the most famous and I remember Ravensbruck because that is where Corrie Ten Boom and her sister were sent. Corrie ten Boom's book "The Hiding Place" is a good book and tells the story of her and her family hiding Jews from the Nazi's, and then being arrested, and eventually ended up at Ravensbruck. Anyone that hasn't read The Hiding Place, its a good read.