World 8-1 (Super Mario Bros.) - Super Mario Wiki, the Mario

World 8-1 is the first level of World 8 in Super Mario Bros. and the twenty-ninth level in said game. It is the longest level in the game. In VS. Super Mario Bros., this is the only level that has a higher time limit than its original version.

World 8-3 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 8 (Super Mario 3D Land), MarioWiki

World 8: Stage 8-1 - Super Mario Guide - IGN

World 1-1 (New Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

World 6-1 (Super Mario Bros.: The Lost Levels) - Super Mario Wiki, the Mario encyclopedia

World 1-A (New Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

Mario Wiki

World 8: Stage 8-1 - Super Mario Guide - IGN

Fire Mario, MarioWiki

World 8-2 (New Super Mario Bros.), MarioWiki

Super Mario Bros. Warp to world 8

New Super Mario Bros. U - Cemu Wiki

Super Mario 3D Land, MarioWiki

World 6-1 (Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

Super Mario Bros (Nes) - World 8-1