The only temple they have allowed is the Zorastrian fire timple in the town of Yazd.
Check it out on Google.
It is the sole reminder of Iran's Aryan past everything else has been erased. For Iran to be truly regarded as a friend of India, it should return to secularism and allow Parsis, Ahmediyyas, Hindus and Bahais to freely practice their faith in IRAN without any persecution.