I'm glad to have found this site. I have several experiences I would love to share, starting with my experiences within schools here.
I live in Las Vegas, and while I was in high school we were required to take PE for our freshman and sophomore years. Now, let's get this straight, I'm not a clean person. I don't organize anything, and though I keep up a clean appearance, you would never be able to tell from either of my lockers. My clothes and items were literally thrown into a pile in my PE locker.
One day, I had come in from PE early. There was absolutely NO ONE with me. And bear in mind, there is a five-ten minute walk from the field to the locker room. When I got into the locker room, I was totally alone, and suddenly I heard the door open. At this point I had just opened up my locker and taken my clothes out, and called out, wondering who it was. No reply, so I walked over, again, pure curiosity, and found there was NO ONE in the locker room, and I was totally alone.
Next thing I know, I heard a loud SLAM! And jumped out of my skin. I went back towards the row my locker was in, and noticed all the lockers were closed. I came to my locker, and realized the lock was also back on it. So I'm spooked obviously, but I still unlock the door, thinking I must be going crazy.
And that's when I opened the door and found my locker NEATLY ORGANIZED. My clothes were folded neatly, my phone placed on top, etc. Needless to say I went pale as a ghost, and grabbed my clothes and phone. I didn't even change, I ran the hell out of there because I had no clue what the heck just happened.
Now, there's a story behind this one. As I later learned from several friends that our high school was actually haunted. It turns out, there was a fire in the locker room some years ago, and one of the teachers apparently had died. It's been said that the teacher can be seen sometimes, and is also known to do things like this. Apparently, I guess my locker did not meet their standards!
Eerily enough, there was another fire later that year, go figure.
My second experience was in my college. I go to the local community college, and one day, I get out of an elevator on the second floor of a building as usual. Looking for my friend, I noticed that she wasn't there. But this absolutely BEAUTIFUL girl IS sitting there. This girl is sitting with several books at her feet, on her lap, and to her side. I turned around for what must have been half a second before realizing "Wait, she was cute! I should go talk to her!".
Well when I turned around, she was gone. Her five-six books, her backpack, EVERYTHING. All in the time it took me to turn around. I thought maybe that she had left down the stairs which were directly beside them. But then I realized - how could someone pack up so many books that easily, and rush off down the stairs that quickly? It was impossible, for anyone. Let alone one lone person.
I never did find out her story, but I was also later told by my friend that many buildings, including the one I was in, are haunted on campus. And I am indeed convinced that I laid eyes on a beautiful spirit that day.