Anybody know any Disneyland secrets?

The little brass circle in the cement just inside the fantasy land side of the Castle represents the very center of the park when it first opened, The skull on the bed in Pirates of the Caribbean is a real skull, The piece of petrified tree near rivers of america is the oldest thing in Disneyland. In the Indiana Jones ride, when you go through the room with all the skeletons, there is one one behind you wearing a mickey hat if you look close.. it says "bones" on it