In this episode, the Silk Road crew travel from Turfan to Korla by train - starting in the Gobi region, crossing the eastern Tian Shan and down into the northern Tarim Basin oases. On the way of their journey, they experience how difficult camel travel over the mountain passes would have been for historic Silk Road travelers. And they visit some historical sites on the journey: fortifications built during Tang dynasty; a Mongolian tribe living in high Tian Shan Mountains; and ruins of Buddhist caves at the outskirts of Yanqi (Karashahr), an oasis town on Yanqi plain.