Not a bothy story, but when I was a teenager my granny lived in a neat old house complete with a secret passageway- the place was fascinating by day, but terrifying under the shadows of night. One time, in the middle of the night, all of the taps in the bathrooms & kitchen suddenly turned on at once, full force. My sister & I had been awake and we went out to investigate, but by the time we crept cautiously to the bathroom, they had all gone off again. The sinks were all wet, they definitely HAD been running.
I took my pillow into the secret passage and hid there 'til daylight!
Next day it was chalked up to old/faulty plumbing...