I have a standard cellar (7×7×4, all bricks cobblestone) with one door as an entry, lit by an unlined copper lantern on the ceiling. It is underneath my house. When I go in it, spooky cave music starts playing, and I have had a drifter spawn in it when temporal activity was medium. The cellar is directly under my storage room, my basement's basement. Is it simply too deep?
I thought maybe the fact that the staircase down to it strays outside the house footprint underground might be the issue, but when I isolated the cellar from the staircase and just dropped a ladder down from the floor above, I still got the cave music. Any suggestions, or do I simply have a haunted basement?