Nīyāsar

Neyasar lies in the Karkas foothills west of Kashan, where a spring feeds gardens and a waterfall above the dry plain. A domed four-arched building, or chahar taq, stands on a height overlooking the settlement. Dating from the Sasanian period, it is commonly identified as a fire temple and preserves a form associated with the religious architecture of ancient Iran. Nearby is an extensive artificial cave, another ancient feature of this mountain oasis above the Kashan desert.