Frosted Glacier

Frosted Glacier is the third world in New Super Mario Bros. U, lying northeast of Layer Cake Desert. Frosted Glacier is a cold and snowy world with pine trees and small indigo mountains that takes place during a constellation filled night. It's one of two of the worlds that the player can choose from after beating Morton in Morton’s Compactor Castle, the other being Sparkling Waters. There are 8 levels in this world, five of them are the regular levels, two are the Fortress and Castle levels and one is the first Ghost House in the game. The boss of this world is Wendy O. Koopa. The Bubble Baby Yoshi is making an appearance in the first level of this world. There are Cooligan Enemy Courses, as they seem to slide into a pipe near the second level.

Levels

 * World 3-1: Spinning Star Sky
 * World 3-2: Cooligan Fields
 * World 3-Fortress: Fortress Freezing Rain Tower
 * World 3-3: Prickly Goombas
 * World 3-4: Scaling the Mountainside
 * World 3-5: Icicle Caverns
 * World 3-Ghost House: Swinging Ghost House
 * World 3-Castle: Wendy’s Shifting Castle

Trivia

 * Every world (counting this one) in New Super Mario Bros. U that is confirmed and is showed, has a pipe at the beginning of the world.
 * This is one of the few worlds in the Mario series to take during night.