A friend of Aaron Rutten (publisher of the image from United States) took this picture at Devil's Den in Gettysburg, Pennsylvania, United States. There is the faint image of what looks like a soldier in the lower left hand corner of the picture. She claims that she saw nothing there when she took the picture. It was taken using a regular 35mm camera.
The Devil's Den, Gettysburg, Pennsylvania. Devil's Den is the nickname for a terrain feature south of Gettysburg, Pennsylvania, that was the site of fierce fighting at the Battle of Gettysburg during the American Civil War.