I have a few experiences that I can't explain.
I used to live in an old crafstman style home, built in 1925. It was probably some kind of servants dwelling because the house behind me was really big, while mine was only about 1/3 it's size (maybe 1,400 sqft) and had a flagstone walkway leading back toward the larger house. Anyway, it was really old, had hardwood floors and was just kind of basic. Sometimes at night, my wife (at the time) and I would hear banging going on in the kitchen. We agreed it was the cabinet doors opening and closing, but we never witnessed it. We had cats, and they were easy enough to blame, but I remember one time the racket was really intense and I sat up in bed to see all the cats asleep around me. I remember being paralyzed with fear.
Another time, in the same house, I was awakened by something. The phenomena always occurred between midnight and 3:00 am, as per the paranormal textbook. Anyway, I saw a bright, almost neon, green light zig-zagging down the hall and disappearing. I figured it may have been the reflection of vehicle lights, somehow making it's way through the blinds, but the more I think about it, I don't know what it was. Green lights? Weird. I never made contact with any entities. I think there was something there.
I sold the house in 2006 and bought another house built in 1963 - and that is another story. Stay tuned, lol. I believe something got stirred up in the wake of my very painful and quite brutal divorce and subsequent home remodel. Haunted places or haunted people? I have other stories that I'll get to in time.