While I was looking for some archived images, I came across photos I had done of the Menger Hotel in San Antonio, TX when we stayed there for a Biblical Archeology Conference in 2004.
We were busy the whole time we were there, and I realized I hadn't taken a photo of the outside of the hotel when we were checking out, so I ran outside, stood in the rain, and took a couple of photos of the front of the hotel. I made adjustments to the exposure from one shot to the next (I was using a high end point-and-shoot camera with a manual mode at that time), so there was a minute between shots.
When I downloaded the photos I noticed that there was a person in the far right window in one photo but not the other, but I hadn't noticed a person in the window when I was taking the photos. As I looked at what looks like a woman in an old fashion dress in the window, I noticed that she is completely out of scale to the window. She could be a child, but to me she looks like a mature woman.
I've always wondered if I captured an image of a ghost. My camera was only 5 megapixels, so the image is not good enough to zoom-in and get a clear image of the woman at 300% to 400%, especially since the lens was wide open at ƒ/1.8. So in keeping with the standards for "ghost photos", mine are quite fuzzy zoomed-in.
Legend has the the Menger Hotel is haunted, and the hotel had stories about ghosts in its bedside literature.