Goldwood Forest (or World A) is the first secret world of Newer Super Mario Bros. Wii. It is a fall-themed world filled with leafpiles falling Chestnuts and tall trees. It is unlocked by finding the secret exit of Rainshed Pond. Completing the fortress will create a shortcut to Cascade Chasm.
|Level number||Level name||Preview||Description|
|A-1||Autumn Plateau||The first stage of this world. It features brambles and fire piranha plants.|
|A-2||Appletree Woods||This level has apples that Yoshi can eat. There is a secret exit leading to A-A.|
|A-3||Fall Harvest||This level has prickly goombas that fall from the trees. Completing this level unlocks Goldwood Music House.|
|A-A||Goldbuzz Forest||This level features koopas climbing on honeycomb like platforms. The secret exit in this level unlocks Fallmart, the shop of world a.|
|A-fortress||Leafpile Fortress||The first fortress in the game, featuring no boss. It has ruined walls with many leaves and enemy traps. This is the final level of World A and completing it leads to Cascade Chasm.|
- The music in some of this world's levels are remixes of the theme for Maple Treeway from Mario Kart Wii.
- Fallmart is the official shop for World A. It can be accessed by going through A-A's secret exit, selling:
- The Goldwood Music House is the official Music House for World A. It can be accessed after completing A-3.