Saint Peru Valley runs east to west and is broadly divided into two parts.
The eastern canyon is the front half of the valley, with forests scattered throughout, and sporadic remnants from the era of the Xinsas Serpentfolk. The Mountain Palace of the old dragon Toragotos is located at the top of the mountain overlooking this part of the valley.
As for the latter half of the valley, it is the entrance to the Trial Grounds—the central district of the former Black Holy City of Xinsas, now dotted with broken walls and ruins. Due to the presence of these ruins, the forest has also become sparse.