Iraj Castle - Credit: Wikimedia Commons
Iraj Castle - Credit: Wikimedia Commons
Iraj Castle ( Qal'eh Iraj) is a fortification built in 4th or 5th century AD in the central region of Ray, Sasanian Empire, near modern-day Asgarabad-e Abbasi, Iran. The monument is known for its peculiar design: large defensive walls with embedded rooms and arches, with towers at regular intervals, enclosing a vast empty interior of 190 hectares (470 acres). Read more on Wikipedia
Source: en.wikipedia.org