These holy marvels help illustrate a city’s identity within the Muslim world and serve as a destination on their own http://on.natgeo.com/2vWReI9

These holy marvels help illustrate a city’s identity within the Muslim world and serve as a destination on their own http://on.natgeo.com/2vWReI9 

https://twitter.com/NatGeoTravel/status/891931468246769665