World 4-Fortress

World 4-Fortress could refer to:
 * World 4-Fortress 1 - The first fortress level of Giant Land in Super Mario Bros. 3.
 * World 4-Fortress 2 - The second fortress level of Giant Land in Super Mario Bros. 3.
 * Marching Milde's Fort - The fortress of the fourth world in Super Mario World 2: Yoshi's Island.
 * Six Face Sal's Fort - The fortress of the fourth world in Yoshi's Island DS.
 * Knot-Wing the Koopa's Aqua Fort - The fortress of the fourth world in Yoshi's Woolly World and Poochy & Yoshi's Woolly World.
 * Cutting-Edge Spire - The fortress of the fourth world in Super Mario Run.