<p>The ruins of the ancient Chinese <b><a href="//commons.wikimedia.org/wiki/Category:Watchtower_(Dunhuang)" title="Category:Watchtower (Dunhuang)">Dunhuang watchtower</a></b> from the Han Dynasty (202 BC—220 AD) — in <a href="//commons.wikimedia.org/wiki/Category:Dunhuang" title="Category:Dunhuang">Dunhuang</a>, Gansu province, China.
</p>
<ul><li>Located along what was the old line of <a href="//commons.wikimedia.org/wiki/Category:Rammed_earth" title="Category:Rammed earth">rammed-earth</a> fortifications that once stretched from the Hexi Corridor (in <a href="//commons.wikimedia.org/wiki/Gansu" title="Gansu">Gansu</a>) to the Tarim Basin (in present day <a href="//commons.wikimedia.org/wiki/Xinjiang" class="mw-redirect" title="Xinjiang">Xinjiang</a>).</li></ul>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28997774@N00/">The Real Bear</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28997774@N00/2222253801/">Summer Vacation 2007, #263 - Watchtower In The Morning Light, Dunhuang, Gansu Province</a>