Yes, that's a mailbox. With a little patch of grass on top. With an angel sitting there. If this doesn't look like a teeny little cemetery, I don't know what does. (Because of the positioning of the mailbox, though, we don't think it's deep enough to actually bury any complete creature carcass. Perhaps the ashes of the last mail carrier are in there?) SpookyRach, because of this scene, we think of you on every walk.