

Ash investigates one of the oldest sections of the Great Wall in Zhangjiakou, which has been fortified by eight successive dynasties and delves into the footsteps of ancient explorers in Wulong.

Ash camps near the Qin section of the Great Wall, waits for the sun to rise, wrestles with an Inner Mongolian champion, learns desert survival techniques from an expert and searches for a lost city.

Ash enters the final stretch of his journey along the Great Wall of China; after observing the building techniques used, he heads into the Gobi Desert to visit Crescent Lake, an oasis nestled between sand dunes.

After meeting an old friend from the Chu Great Wall, Ash visits some stone structures, both natural and human-made, at Yardang National Park and Xiaofang City; with one final phone call home, it's time to leave The Great Wall of China.