The Castle is made out of Snow and Pearlstone Bricks. Giving its name "White Castle". Most of the world is Hallow and Snow, but in the Underworld there is a large area of Corruption under the Hell bridge. It has a Goldfish farm, Bunny farm, Underground Mushroom and Jungle farm and also a Herb farm. There is also a good PVP dungeon under it. It's right above the Jungle farm.