The Passagio Stretto is a stretch of land, roughly 16 kilometers long, between the Duro river and Principe Peaks. It is the sole connection between Luno and Asemo.
The river cuts a deep canyon through the landscape, making this stretch of land the only path to the Crepuscolo Bridge near Asemo, connecting Val Luno to Val Aregis.
This unique position made the region of vital importance during the Invasion of Val Luno, where the Luno Rebellion and Royal Army of Aregis both struggled for control of the passage.