The "haunting" of Rainbow Bridge in Lake City, Iowa, revolves around a playful story of a chocolate-eating ghost: leave an unopened chocolate bar on the bridge at midnight, and after five minutes, the chocolate inside the wrapper will be gone, leaving an intact wrapper, according to local lore. This is the primary description associated with the bridge and does not involve a tragic ghost story but rather a whimsical tale of the spirit's peculiar appetite. The Chocolate Ghost Legend: The legend states that if a person places an unopened chocolate bar in the center of Rainbow Bridge at midnight. After a five-minute wait, the person leaves the bridge. The chocolate bar's wrapper is found perfectly intact, but the chocolate itself is gone. The local lore suggests that a "chocolate-eating ghost" is the culprit behind this phenomenon.