Bam's vaulted and domes structures are characteristic of a medieval fortified city—a surreal metropolis in the middle of the desert http://on.natgeo.com/2l2lGMy

Bam's vaulted and domes structures are characteristic of a medieval fortified city—a surreal metropolis in the middle of the desert http://on.natgeo.com/2l2lGMy 

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