Fire temple Yazd
A fire temple in Zoroastrianism is the place of worship for Zoroastrians, often called dar-e mehr (Persian) or agiyari (Gujarati). In the Zoroastrian religion, fire (see Atar), together with clean water (see Aban), are agents of ritual purity. Clean, white "ash for the purification ceremonies [is] regarded as the basis of ritual life," which "are essentially the rites proper to the tending of a domestic fire, for the temple [fire] is that of the hearth fire raised to a new solemnity".
For, one "who sacrifices unto fire with fuel in his hand [...], is given happiness."
As of 2010, there were 50 fire temples in Mumbai, 100 in the rest of India, and 27 in the rest of the world.