World - Super Mario Wiki, the Mario encyclopedia

A world is a group of levels in Super Mario games. In Super Mario Bros. and Super Mario Bros.: The Lost Levels, each world always has exactly four levels, and in Super Mario Bros. 2, each world has three. However, starting in Super Mario Bros. 3, most games

Super Mario World 2: Yoshi's Island - Super Mario Wiki, the Mario encyclopedia

World 2 (Super Mario 3D World) - Super Mario Wiki, the Mario encyclopedia

Super Mario World (TV Series 1991) - IMDb

Super Mario Bros. 3 - Super Mario Wiki, the Mario encyclopedia

Super Mario 3D World - Super Mario Wiki, the Mario encyclopedia

Gallery:Super Mario World - Super Mario Wiki, the Mario encyclopedia

Super Mario All-Stars - Super Mario Wiki, the Mario encyclopedia

Mario - Wikipedia