Chak Chak is a village in Rabatat Rural District , Kharanaq District , Ardakan County , Yazd Province , Iran . At the 2006 census , its existence was noted , but its population was not reported .
The village consists of a pir perched beneath a towering cliff face in the desert of central Iran . It is the most sacred of the mountain shrines of Zoroastrianism . Located near the city of Ardakan in Yazd Province , Chak Chak serves as a pilgrimage point for pious Zoroastrians . Each year from June 14-18 many thousands of Zoroastrians from Iran , India and other countries flock to the fire temple at Pir-e Sabz . Tradition has it that pilgrims are to stop the moment they see the sight of the temple and continue their journey on foot the rest of the way .
In Zoroastrian belief , Chak Chak is where Nikbanou , second daughter of the last pre-Islamic Persian ruler , Yazdegerd III of the Sassanid Empire , was cornered by the invading Arab army in 640 CE . Fearing capture Nikbanou prayed to Ahura Mazda to protect her from her enemies . In response to Nikbanou's pleadings , the mountain miraculously opened up and sheltered her from the invaders .
Notable features of Chak Chak include the ever-dripping spring located at the mountain . Legend has it that these drops are tears of grief that the mountain sheds in remembrance of Nikbanou . Growing beside the holy spring is an immense and ancient tree said to be Nikbanou's cane . Legend also has it that a petrified colorful cloth from Nikbanou was also visible in the rocks , although pilgrims have since removed it .
The actual temple of Chak Chak is a man-made grotto sheltered by two large bronze doors . The shrine enclosure is floored with marble and its walls are darkened by fires kept eternally burning in the sanctuary . In the cliffs below the shrine are several roofed pavilions constructed to accommodate pilgrims .