Passage: Chogha Zanbil (Persian: چغازنبيل‎; Elamite: Dur Untash) is an ancient Elamite complex in Khuzestan province of Iran. It is one of the few existent ziggurats outside Mesopotamia. It lies approximately 30 km (19 mi) south-east of Susa and 80 km (50 mi) north of Ahvaz.

Question: What type of structure is Chogha Zanbil?
ziggurats