Back in the days before dinosaurs ruled the earth, before digital technology, we actually had to stuff a roll of film inside of a camera, take pictures, and then take them to be developed. (I know...hard to beleive, ain't it).
Well, there's a guy out there, that makes a hobby of collecting these old cameras. Sometimes, he finds them with the film still inside of them. He claims about a 50% success rate, in recovering the images from this old film.
The link below leads to prints made from processing the film that he's found in these old cameras. In many cases the exposed films were over fifty years old. You are seeing them for the first time as they were lost by the photographers that took these images. Kinda sad, really.
http://westfordcomp.com/updated/found.htm