Photos of ghosts capture everyone's imagination, teasing viewers with the possibility that there is proof of something beyond death, captured on film.
However, for every genuine ghost photo out there, there are hundreds, if not thousands, of pictures that only managed to capture enthusiastic use of Photoshop and clever camera trickery.
Here are 21 such photos that the internet has declared as fake. Are they, though? Have a look and see if their explanations satisfy you...