Chilly Harbour is the 6th level is Super Mario Rainbow Road and the first located in the interior of the castle. Once you enter the castle, head into the painting of yellow bricks. This level is a small port side town, with yellow brick buildings, grey stone walkways, though with mostly a grassy surface. There are a ton of various sized building spread out along the entire stage, either with a flat, tile roof, or the red sloped ones shown in earlier levels. In the middle of the level is a small body of water. There are also many breakable stacks of crates scattered around the town.