Acorn Plains

Acorn Plains is the first world of New Super Mario Bros. U. It is a plains world with trees, shrubs, and jagged mountain. The world contains the Acorn Tree, which is one of the sources of the Super Acorn power-up. The world lies south of Layer Cake Desert, west of Sparkling Waters, and Soda Jungle, and south-west of Frosted Glacier.

The world contains eight levels: 5 normal levels, a Tower level, a Castle level, and a secret level. The world also includes a Piranha Plant Enemy Course and two Toad Houses.