Rp Tutorials

I was wondering if there was a map making program? I want to draw a map for a group psl I'm doing, the setting is a boarding school in an old castle. I tried googling 'castle grounds' but nothing really came up...at least not what I wanted.

Also where can I find pictures for dorm rooms? It's for the same group psl, and I thought it would make it more realistic if there were actual photos for the dorm rooms...perhaps floor plans or something along the lines of that?