I have seen some thing that i cant explain. Was it ghosts? Don't know but it has at least left me with an open mind. I do believe there are things we cant explain today, perhaps never will be able too, but if some of these things are ghosts or spirits i don't know.
My own experience was long ago during a walk in the forest. I was walking in a gravelroad when i noticed a man and a women that followed me but could not be heard. They were dressed in elderly clothes, very elderly. Somehow they never made me fear them but made me curious. So i tried to get closer but somehow they always held their distance. I was close enougfh to see their clothes, their faces but never really close. I know all the people that live nearby and it certainly wasn't any of them. I later asked the farmer who lived nearby and he told me that just there there just to live an old couple about 100 years ago. They had a very small field. Their house was not standing anymore but the foundations are probably still there he said. They were. I checked them out some days later. They were close to where i had seen my "ghosts". I never saw them again.