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.

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Super Mario Bros 3 World 7 Fortress 1 - video Dailymotion

World 7-1 (Super Mario Bros. 3) - Super Mario Wiki, the Mario

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Super Mario Brothers 3 - World 7 Mini-Fortress 1 Nintendo NES Map