I grew up in an old-ish house c1830 and always got freaked out in the bathroom. It was almost certainly somebody's bedroom to begin with; the house predating indoor bathrooms; but what creeped me out was the irregular surfaces of the walls. These reflected the light so you could see shapes that looked like skulls in them. I think it was the way you couldn't always see them immediately, so I'd study the patterns until I picked them out. This was slightly less scary than accidentally glancing up and seeing a skull pattern jump out at you.

I hated baths, especially the bit where you'd close your eyes to rinse your hair; you'd have to open your eyes after and look for the skulls all over again.
(Cameltoad, Mon 11 Apr 2011, 8:48, Reply)