Dunhuang Sand Dunes and Crescent Lake (月牙泉)

Dunhuang Night Market

Gansu - Silk road and Yangguan pass (阳关)

Dunhuang - Mogao Caves (莫高窟)

Below pics aren't mine as photogrpahy is banned. Got them of the net, gives an idea of the interior.

Qinghai/Gansu - Through the Taklamakan Desert

Qinghai/Gansu - Onwards to the deserts of Dunhuang! (敦煌)