World 1 is the first world of the 3DS game, Super Mario 3D Land. This takes place at the Mushroom Kingdom somewhere near Peach's Castle. The boss is actually a Fake Bowser or a tailed Goomba. There is a game block and a Toad House here.
- Before World 1-1: A storm occurs. When Peach checks the Tail Tree, she is kidnapped by Bowser. Mario and three Toads find out this happens.
- After World 1-Castle: The Fake Bowser is destroyed and reveals to be a Goomba with a Super Leaf.