Around 2010, we lived in some apartments in Newnan, Georgia that used to be an old factory. Most of the other resident we ran into agreed that weird stuff would happen there, like seeing apparitions of people. Very little happened to me, personally, but my wife experienced much more than I did. Some of these experiences include, but aren't limited to:
-She had the front door unlock, open, shut, and lock again all on its own. It happened with so little fanfare that she, at first, assumed that I had walked out until she realized I was in the shower.
-She got a coat hanger thrown at her. We were in bed and she was woken up by the clatter of a coat hanger coming to rest on her side of the bed (concrete floor and metal coat hangers make a fair bit of noise). The hell of it is, the only place we kept coat hangers was in the closet, and the only two ways that it could have made it there from the closet was 1. to go left into the bathroom, make a 90 degree turn, and then forward out of the bathroom OR 2. launch up and over the closet wall and then go forward about ten feet.
-She would feel somebody poking her feet at night time. Of course, nobody was ever there.
A couple of times, we'd hear these loud footsteps go racing across the metal roof. I've had metal roofs before, and I know what it's like when trees drop stuff on them; you can hear the debris rolling and banging down the slope of the roof until it falls off or settles into a depression. This wasn't that. There would be loud, fast thuds that would run across the length of our apartment, across the slope of the roof in a matter of a second or two.
We also had a friend stay there to dog-sit while we were away. He has excellent vision, and told us that he saw an extra dark shadow in the corner of our vaulted ceiling that the dog also honed in on shortly afterwards. When I say dark shadow, I mean that the lighting there was inconsistent with how it was every other day; that corner was never that dark before or after, but for whatever reason had a deep shadow in it for that one of several days my friend was there.
What really sells it for me is that my wife never had any kind of paranormal experience before or since. She's not generally the kind of person who's into this whole scene; she loves a good ghost story as much as anyone, but she's not the type of person who commits much thought to it or sees spirits around every corner.
Anyway, it didn't really seem to build towards anything, it was just kind of a thing that was there and sometimes you happened to notice it (or vice verse, I suppose). A couple of the residents tried to invite one of those ghost shows out, but the property management team caught wind of it and shut that down immediately. Used to be that you could see tenants talking about the haunting on their google reviews, but I just looked and they must have cleaned those up.