What two (or more) subjects would be interesting to combine in a classroom setting?

In Spanish today my class acted out basic conversations, but instead of speaking as if we were talking to a friend, our teacher brought in an Acting instructor and had us pretend we were on stage. After class, I truly felt that being engaged in that way made a big difference.

I started thinking about how cool it would be for schools to combine two subjects (or more if necessary) to enhance learning. Besides Spanish and Acting, what would some other good combinations be and, and why?