When I was younger and still lived with my parents, we rented a home in South Hill, VA while they had a house built outside of town. A few strange things happened while we lived there...
There were several small storage rooms/attics peppered throughout the upstairs area. Now and then, I'd hear taps, or knocks coming out of them. It definitely wasn't the house settling, or plumbing noises. Never figured it out. My then-girlfriend stayed with us for a few days and she heard it a few times herself. It only happened at night. No matter the season, or temperature.
My parents slept in a bedroom downstairs, so I had the upstairs pretty much to myself. At night, whenever I was there alone or my parents were asleep, I really would get the feeling that someone was following me back up the stairs, whenever I'd go down for a snack, or whatever.
One night there, I had a horrible nightmare, and it was truly terrifying (still makes my blood run cold thinking about it). In it, I was walking into my parents bedroom (in our old house - the one I grew up in), and our cat was in there. It turned towards me and started making a horrible screaming/screeching noise, and started growing bigger and darker.. like total blackness. The sheer terror I felt was immense. I've never had a dream like that before, or since. I hope I never do again.
One other night, I remembered falling asleep with a scented candle lit. I woke up in the middle of the night and it was out. Still plenty of wick, no moving air in the room. Could have randomly just burned out, but it was still strange...
It got to the point where I started sleeping in the mornings, after the sun would come up, so that I could stay up all night. I'd waste time on the internet or play Playstation games.
I asked my parents about the history of the house, and they said that a very tall older woman lived there with her abusive handicapped son, who spent all of her money. That's all I knew about it.
Needless to say, I was happy as hell to finally move out of there. I can't say I believe in ghosts, but there was something definitely up with that place... I've never had any experiences like those before living there, or since.