InsaneJournal

Royalty Free Graphics Source
I found a great resource for public domain photographs and artwork for use in doing journal layouts and game graphics. It's called Liam's Pictures from Old Books and there are almost 3000 pictures, maps, and photographs to peruse. All of the images are public domain, so there are no worries about royalties or infringing, though he does request you credit the website and the original book source.

It works exceptionally well for fairy tale and magical games. There is an exceptional painting of Windsor Castle from 1870 I am using for a royalty based game.