The old RAF Scampton Officers' Mess bar corridor was reputed to contain an unpleasant, "presence" of some sort. When I was stationed there (1988-89) I was told by the Mess manager that staff didn't like going to the cellar alone because some had been pushed or poked by something unseen.
A member of the Red Arrows, on Station Duty Officer duties and locking up last thing at night, was very much unsettled when he encountered a figure in WW2 flying clothing, standing by the fireplace in the Ante room.
What was even more surprising was that the station actually managed to pin down a member of the Reds to be the SDO.....!