Aranvis Highs is a rugged mountain landscape scarred by an acid-tainted river. Corrosive water has stripped vegetation from parts of the bank and left the surrounding ground visibly damaged, while rocky slopes funnel movement toward a cave set into the heights. The environmental damage makes the location dangerous before anyone knows what is hiding inside.

For a GM, the map works as both wilderness hazard and lair approach. The acid river creates a hard tactical boundary, dead terrain provides evidence of its effects and the cave offers a natural destination for investigation or pursuit. Characters can fight outside among exposed rock, then continue into tighter interior passages without changing the thematic focus of the encounter. Aranvis Highs is well suited to a corrupted watershed, alchemical disaster zone or monster refuge where the landscape itself points toward the source of the problem.