I was on a camping trip with some friends and we stayed in a single room cabin that was handbuilt by his great grandfather in the 1920s or so. It was very basic and rustic with just a frame and boards for the walls. What seemed like a very good bit to add to a potential game was that almost every time someone stays there, they find a space on the wall and leave a message about their trip. It was dark wood and most of it was in pencil, pen, or carved in so they weren't immediately visible and noticeable (you had to walk up to the walls and focus on actually reading them), so I can imagine a lot of creepy elements of players reading mostly jovial messages with some sinister undertone emerging from them....