In one of the rooms (with a big green mass at the bottom right of the screen under the thin piece of land), when you first enter, you will curve around until you are walking down an iced path. There will be one door and a small stairway leading down. Go down and walk into the curved wall. Enter a room, then go into the next room that is all blue with the bridge linking both sides. A chest with a Ribbon is located to the far right of the bridge (walk through the wall).