World 2-4

World 2-4 is the name given to the fourth level of the second world in several games and some related media:
*World 2-4, a level in Super Mario Bros.
*World 2-4, a level in Super Mario Bros.: The Lost Levels
*World 2-4, a level in Super Mario Bros. 3
*World 2-4, a level in New Super Mario Bros.
*World 2-4, a level in New Super Mario Bros. Wii
*World 2-4, a level in Super Mario 3D Land
*World 2-4, a level in New Super Mario Bros. 2
*World 2-4, a level in Puzzle & Dragons: Super Mario Bros. Edition.
*World 2-4, a level in Super Mario Maker for Nintendo 3DS.
Several games have a fourth level in their second world, but are not named World 2-4:
*Donut Plains 4, the fourth level of Donut Plains