Pigeon Island - This grungy run-down sim is in dire need of a paint and some TLC. I hope no one does that though cos it is fabulous as it is. Buildings, parks, broken streets and enough grunge to make you want to shower when you get home.
Everwinter - This theme park has seen better days. It was also hard to get a decent hotdog. Loads of places for great photos if you need things to look a bit unkempt.
After the Fall - The title of this sim says it all. It is messy and dirty and filled with junk and discarded vehicles. Probably not for high fashion shots, but then perhaps it is perfect! (NOTE: Is role-play sim).
Tempelhof - This sim is full of places for some very cool shots. I found it hard to decide where to take a photo that exemplified the whole place. I also loved the port on the other side of the sim with subs and boats.
Hazardous - Great for photos. Run down playground, old rustic buildings, pond and windswept coastline. Poses EVERYWHERE.
Innsmouth - This place is seriously in need of paint and perhaps an exorcism or two. Dilapidated buildings, rust and weeds are the mainstay of this place. Great spot for those slightly spooky or grungy shots.