Gonbad Kabud Mosque - Credit: Wikimedia Commons
Gonbad Kabud Mosque (Persian: مسجد كبود غنبد, literally Blue Domed Mosque) is a historic mosque located in Kalat County, Razavi Khorasan province, Iran. It is number 661 on the list of Iran's national heritage monuments, and dates back to the Seljuk and Afsharid periods. Read more on Wikipedia
Source: en.wikipedia.org