Even if SOME UNEXPLAINED phenomena does happen there, that is NOT evidence that it IS a "Ghost"----Just something unexplainable , at least to YOU, and at best, unexplainable to contemporary Science----But it is still only "UNEXPLAINED"----no way to prove it is a "ghost" or "Spirit of the dead"----indeed, what would be "proof"? REAL does not mean "Ghost".
The only way you can see. or experience such unexplained phenomena (if it is real, in the first place) is to hang around the area WHERE it is SAID to happen.----Several hours or visits may be necessary. and when of if you get lucky and observe it, try to duplicate and otherwise debunk it if you can----But still, remember, even if it can't be debunked it, is STILL not proof it is a real "ghost".