© 2011 Matúš
Great Wall watchtower
Great Wall watchtower
Signal towers were built upon hill tops or other high points along the wall for their visibility. Watchtowers were built for communication purposes between the army units along the length of the Great Wall. There are more than 10,000 watchtowers and beacon towers on the Great Wall.
21 Nov
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Matúš, posted on
November 21, 2011 at 9:33 pm, filed under
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