World 1-Fortress

Level
World 1-Fortress
Super Mario Bros. 3 Super Mario All-Stars Super Mario Advance 4
Level code	1-F
World	Grass Land
Game	Super Mario Bros. 3
Time limit	300 seconds
Boss	Boom Boom (grounded)
Music track	Fortress BGM
Music sample
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World 1-Fortress is the fortress and fifth level of Grass Land in Super Mario Bros. 3. It can be accessed after completing World 1-2, and its own completion unlocks World 1-5.

Layout

Location of the Magic Whistle

As the first fortress level of the game, this level is relatively simple. Obstacles such as Roto-Discs and Podoboos are introduced, as well as Dry Bones. There are multiple gaps to jump across, while avoiding the Podoboos that continuously rise up and down between them. A ? Block containing a Fire Flower may be found here. After more gaps, there are a few sets of Roto-Discs that the player must get through, followed by more gaps. At the end of the section, a door leading to the next part of the level may be found. Another ? Block, this time containing a Super Leaf, is also found here, along with a single Dry Bones. Beyond the door is a hallway with a spiked ceiling. The ceiling slowly rises up and down, meaning the player must duck in order to avoid taking damage from the spikes. At the end of the section is another door, which rises up and down from the ground with the ceiling. Beyond this door is Boom Boom's arena; defeating Boom Boom will destroy the fortress, unlock the gate near World 1-1, and allow the player to continue onto World 1-5.

The level has a secret exit that is accessible by Raccoon Mario only. It can be reached by dashing near a door while the Power Meter is filled and flying up towards the ceiling. By continuing right, the player character can enter a door to another room with a Magic Whistle. When collected, the fortress is cleared instantly, although the gate near World 1-1 does not open.

Enemies

Image	Name	Count
	Podoboo	7
	Roto-Disc	3
	Dry Bones	1
	Boom Boom	1 (boss)

Items

Image	Name	Count	Note(s)
	Coin	0	-
	Super Mushroom	2	Replaced with one of two power-ups if Mario is already in Super form
	Fire Flower	1	Replaces a Super Mushroom in the first block if Mario is already in Super form
	Super Leaf	1	Replaces a Super Mushroom in the second block if Mario is already in Super form
	1-Up Mushroom	0	-
	Magic Whistle	1	Found in a small chest in the secret room

Level map

File:SMB3 World 1-F Map.png

Map of World 1-Fortress (Super Mario Bros. 3 version)

Names in other languages

Language	Name	Meaning	Notes
Italian	La Fortezza	The Fortress
	Mondo 1-Fortezza	World 1-Fortress

Trivia

Japanese version

International version

• In non-international releases of Super Mario Bros. 3, the door into Boom Boom's room is placed further from the wall and some spikes on the ceiling are positioned differently, making entering the door more difficult.