If you haven’t seen this by now, that’s sort of impressive because this photo has become wildly popular.
I have no idea if this is real or photoshop, but the photographer (a tourist) seemed genuinely astounded at what he seemed to have caught. It also seems natural that someone would wait until a place seemed empty to take a picture, and that someone would want a picture of the beautiful staircase. However, there is the potential for the “panorama” setting on the phone to be the cause of the apparition. There’s a whole blog on weird crap that happens when you take a panoramic photo. And of course the hotel isn’t deserted, it’s entirely possible someone else did show up. I will say that the “ghost” does appear to have light reflecting off her shoulder from where the light overhead seems to be, which would make me think its an actual person and not an apparition but what do I know.