World 4-1 (Super Mario Bros. 3)

World 4-1 is the first level of Big Island in Super Mario Bros. 3. This level introduces massive enemies, such as Grand Goombas and Big Koopa Troopas. The level is accessible upon completing and by going down the south Warp Pipe on the map, and its own completion will unlock World 4-2.

Layout
The players starts next to some large pipes, the second of which has a Piranhacus Giganticus, and a low hanging cloud, followed by some more giant enemies and a Giant ? Block containing a power-up that the player has to kick a Koopa Shell into. Afterward are some waterfalls the player can swim up to reach a secret area in the Warp Pipe to the far right, where two 1-Up Mushrooms can be found, along with some Big Berthas. Beyond the waterfalls are a Grand Goomba, a Colossal Koopa Paratroopa, and a Giant ? Block containing a power-up. Continuing on, the player will have to jump across a chasm using pipes and clouds as platforms to reach a pipe leading to the goal.

Enemies

 * Piranhacus Giganticuses
 * Big Goombas
 * Big Koopa Troopas
 * Colossal Koopa Paratroopas
 * Venus Fire Traps
 * Big Berthas

Level statistics

 * Power-ups: 2 (Super Mushrooms or Super Leaves)
 * 1-Up Mushrooms: 2
 * Secret areas: 1