Factory (Super Mario RPG: Legend of the Seven Stars)

The Factory (also known as Smithy Factory) is the gloomy dimension where Smithy and his cohorts resided during the events of Super Mario RPG: Legend of the Seven Stars. The entire factory was filled with Smithy's Machine Made weapons and the assembly lines that carried them. The factory's design greatly resembles that of the Airships of Super Mario Bros. 3, including the Bolt Lifts sometimes utilized to reach far platforms and the fog that fills the air. Mario, Mallow, Geno, Bowser, and Princess Toadstool fought many hard battles and endured countless perils during this last leg of their journey.

Unlike other worlds of the Marioverse, like Earth, the Mushroom Planet itself, or Subcon which are filled with wonder, the Factory is seemingly little more than a hellish, dark void filled with mechanical beings and bizarre, sinister creatures. (Compare with Castle Bleck)