Roe, I've mentioned Creepy Old Lady house more than once here.
It was a house I looked at before I bought Bedside Manor. It had not been cleaned out since its previous occupant had died there. The house smelled sickly sweet, there were pill bottles on almost every available surface, and no actual basement...just a trapdoor cellar. Also there was a huge decorative bowl filled with keys in one room.
When we looked at the place, the power was off as the house had been empty for some time so the utilities had been cut off to discourage people from breaking in and squatting there. (no power, heat or water). So all we had to explore the house with was some flashlights the listing agent had left. In the end, it was my father (usually among the most prosaic of men) who said, "We should go, we shouldn't be in here."
I told my parents if I bought that place my power bill would be through the roof because I would NEVER turn off any lights.