I found a really large image of a swamp/forest online and cropped them with my buddy that does photography and picture stuff. Then printed them off on some nice glossy paper at Cosco. Here are some pictures!
http://i.imgur.com/uMnrMHD.jpg
http://i.imgur.com/T8T5qFH.jpg
http://i.imgur.com/8z14xh4.jpg
http://i.imgur.com/0RdgSZw.jpg
http://i.imgur.com/oMDLd85.jpg