I’ve been making these collages from found photographs on the stock website istockphoto.com. I hate to explain but basically these stock agencies undersell photography because any dude with a dslr can sell his or her work to istockphoto, among others, for very cheap. Then in turn lazy newspapers buy the photos to publish (to basically fill up space/make formatting and design easier). You’ll often see unnecessary or irrelvant photos accompanying articles that are better off as text alone.
To make the collages I browse through and save photos from one search term (ie: water). I cut out triangular sections, since an X shaped line is laid on top to prevent people from stealing the photos. Please do click for full size