The Skymetal Workshop is a substantial underground facility where polished stone halls, workshops, storage areas, and technical chambers sit beside stranger spaces built around arcane or alien machinery. Clean geometric rooms contrast with damaged sections and rougher passages, while worktables, devices, metal fixtures, and marked floors give the complex the unmistakable feel of a place designed for experimentation rather than worship or habitation.

Its layout gives a GM several distinct encounter zones without losing the sense that every room belongs to the same facility. Long halls create dangerous sightlines, smaller workrooms support searches or close-quarters fights, and larger chambers give important devices or objectives enough space to matter on the battlefield. In Rusthenge the workshop fits the adventure's skymetal themes, while outside that campaign it can become a lost artificer's laboratory, an ancient forge complex, a sealed research station, or the remains of a civilization whose machines are easier to find than to understand.