It is the most sacred of the mountain shrines of Zoroastrianism. Located near the city of Ardakan. 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 riding the moment they catch sight of the temple and complete the last leg of their journey on foot.