World 7-Fortress 1 - Super Mario Wiki, the Mario encyclopedia

World 7-Fortress 1 is the first fortress level and the seventh level overall of Pipe Land in Super Mario Bros. 3. The level becomes accessible upon completing World 7-4 and its own completion unlocks World 7-6.

Whomp's Fortress, Nintendo

Super Mario World - Wikipedia

Level - Super Mario Wiki, the Mario encyclopedia

World 7-3, A history of the Mushroom Kingdom Wiki

Super Mario 3D World, MarioWiki

World 8-Fortress - Super Mario Wiki, the Mario encyclopedia

World 7-Castle (New Super Mario Bros.), MarioWiki

World 7-Fortress 1 - Super Mario Wiki, the Mario encyclopedia

World 7-6 (Super Mario Bros. 3) - Super Mario Wiki, the Mario

World 7-1 (Super Mario Bros. 2) - Super Mario Wiki, the Mario