There are countless photos of ghosts and other supernatural phenomena floating around on the internet.
A lot of them are faked with lens flares, double exposure, or just seeing faces where there aren't any.
However, there are some pictures that are reportedly not doctored, not photoshopped, and not double exposed.
ViralNova has compiled 21 of these photos that show mysterious sightings reported by people.
Are these real or have they just not been debunked yet? Have a look and decide for yourself.