A history of science class (with special emphasis on all the lady scientists who got ignored because they were, well, ladies) would be awesome! I did take History of Mathematics as an undergrad, but it was a math class, so it wasn't very biographical. It was a lot of "Here are the first two volumes of The Elements. Have fun with Euclid, and when I see you on Thursday, I want you to be able to reenact the first five proofs in Book 1." Which was still pretty cool, but not history-focused in quite the same way I had expected.