I worked at an old hospital in HS that was then shut down due to the new hospital being built but they kept the old folks home up. Working in the cafeteria of that place and late at night all alone some weird stuff happened. Like the magnetic doors opening and closing on their own. Voices coming from the operating rooms that were chained and locked up. Lights randomly turning on when there was no power to that portion of the hospital.
Feeling like someone is touching you but no one else was around. Creepy stuff man and oh yeah the occasional old person escaping from the retirement home and them randomly just ramming their wheel chair into the elevator door and freaking you out when delivering the food to the retirement home. I think that freaked me out more than the other stuff.