I had an experience, but that's not too "ghosty". It was on my elementary graduation. We stayed in a mansion for 3 days. There was a playground, and when it was rest time my friends, my twins and I want to play there. Suddenly I saw my twins running to the mansion. My friend and I ran to catch up with her, but suddenly she showed up behind us. So it means the one who was running before wasn't her. And in my friend's photo, there was a girl with white dress and long hair near the ice cream shop. But she didn't notice it when she took that picture. Maybe that mansion was haunted..