The Silk Road - Episode 4
The Dark Castle
This episode includes a good sequence illustrating facets of travel via camel caravan along the Silk Road. Focus is on the ruins of the fortress-city of Karakhoto (one of the centers of the Xixia or Tangut state that flourished in the region just prior to the Mongol invasion of the thirteenth century), where the modern archaeological/film crew finds various artifacts including pieces of silk and written texts.
This film would be quite appealing for younger students because it includes some dramatization of the semi-legendary events surrounding the conquest and destruction of Karakhoto by the armies of Genghis Khan.