I’ll admit to being a bit of a cynic when it comes to believing in phenomena such as ghosts, UFOs and other things that go bump in the night. On the other hand, I’m not so full of myself that I can outright say that those things don’t exist. There’s plenty of mysterious stuff happening every day that I have no explanation for, so who am I to judge? Take a look at these 15 photos that are difficult to explain and decide for yourself.