The Edinburgh Fringe Festival is the largest arts festival in the world and a street photographers dream. Probably one of the things that make this festival so different, is that the programme is determined by the performers, producers, promoters and venue managers, rather than the organizers (The Fringe Society). If you've never been, I sugest you put next years event in your to-do list. You might also like to drop in to Edinburgh Stills to see what exhibitions they have on.