Forg Darmian castle is one of the historical castles of southern Khorasan province, which is located in the village of Fugg. Fort Forg is located 90 km east of Birjand and 10 km from Asadiyeh city. The fortress of Forg Darmian Castle was built at the time of Nader Shah by the governor of Mirza Baqa Khan.
The main gate of the Forg Darmian Castle on the east side and a smaller gate on its northern side. The king is at the highest point and has spaces such as stables, water storage, two-story rooms and a mosque.