Google Earth link for this location.	Here is the location of TongWanCheng, China via Google Earth.
TongWanCheng was constructed in 419AD by the Hunnu who had migrated to China.	View of West Corner Tower, from the Southeast wall note:the orientation of the city walls is not North - South. But Northwest - Southeast. Quite different from the Chinese practice. A walled city/compound from the Hunnu period that is located in Mongolia has this orientation. The corners are located on the compass points. Also, Khirigsuur in Mongolia are often oriented in a similar Northwest - Southeast direction.  The Khirigsuur may be oriented to the winter Solstice.
The Southeast wall	View of North corner tower from Southeast wall
The North Corner	The Southeast Wall
The Southwest wall from the South	View to the Southwest
The Southwest wall, looking from the South corner toward the West corner	The West Corner, viewed along the Southwest wall
Construction details, the white color comes from rice powder mixed with the soil to add strength.	Construction details
Construction details	Maybe part of Southwest Gate
West Corner from along the Southwest wall	The West Corner
The North corner	The North corner from the NW wall
The North Corner	The North Corner
The North Corner	The Northeast wall
The Northeast Wall	The Central structure, the lower smoothed area is a modern improvement.
The Central structure, with the West corner in the right background	The nearby river
A manmade waterfall	Hits the spot on a hot afternoon.

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