Yazdūye
Yazduye, later called Yazdan, lies in the dry Petergan plain east of Qaen. The oasis was known for numerous underground water channels, remembered as the Seventy Qanats, which sustained cultivation in the desert. A historic settlement flourished here in the early Islamic centuries, and the fifteenth-century geographer Hafiz-i Abru recorded the name Yazduye. The road through the oasis connected Qayenat with Ghuriyan and Herat, while an old fort guarded the settlement.