The most noticeable religious center of Tehran lies in one of the ancient regions of Iran called Shahr-e-Rey, situated on the southern side of the capital. Shah Abdol-Azim Shrine originally dates back to the Ilkhanid Era. Still, the existing architecture and design are the combination of different architects’ skills, and the result takes your breath away the moment you enter the place. The exquisite walls of this place have housed three holy shrines, among which the main one belongs to the son of the second Shia Imam. There are other historical places in this region of the capital belonging to Sasanian and Seljuk empires that you can take a look at.