Blue Mosque at Mazar e Sharif, in Herat, North Afghanistan

The name "Mazar-e Sharif" means "Noble Shrine", a reference to the large, blue-tiled sanctuary and mosque in the center of the city known as the Shrine of Hazrat Ali or the Blue Mosque. Some Muslims believe that the tomb of Ali ibn Abi Talib, the cousin and son-in-law of Prophet Muhammad, is at this mosque in Mazari Sharif. However, most Muslims believe that the real grave of Ali is found within Imam Ali Mosque in Najaf, Iraq. On the contratary, it is believed that Ali's remains were transferred to Mazar-i-Sharif as per request of Ja'far as-Sadiq to prevent it from being desecrated by enemies. Source: wikipedia