So, Xi'an, the end or the beginning of the legendary Silk Road, and another city encircled by colossal stone walls, only this time, though they appear on the map, some of the walls no longer exist. But still, the size of the original walls was impressive, like they planned for modern day urban sprawl, so far apart they can comfortably encompass the modern city. Xi'an in nice if, again, horribly polluted. This has probably been the worst pollution in terms of visibility we've experienced so far, you can't even see the end of the street, Xian should be in the Hayward Gallery right now, as part of the 'Blind Light' Exhibition by Antony Gormely But it's a very nice city, you can walk around it easily and there is plenty to do, there's a Muslim/Middle Eastern
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