Qalʿah Zaḥḥāk, south of ʿArablū.
A possible location for ancient city of Phraaspa or Phraata, according to the Barrington Atlas.
See:
- Ancient castles and fortresses in Iran: Zahhak Castle, https://www.tehrantimes.com/news/447988/Ancient-castles-and-fortresses-in-Iran-Zahhak-Castle
- https://irangazetteer.humspace.ucla.edu/catalogue/qaleh-zohak-%d9%82%d9%84%d8%b9%d9%87-%d8%b2%d9%87%d8%a7%da%a9/
- Derakhshi, H. and F. Khademi, “The Chronological Occupation of Zahak Castle on the Basis of Three Seasons of Archaeological Excavations (2000-2002),” Bulletin of Parthian and Mixed Oriental Studies, vol. 1, 2005 (2006), pp. 31-42.