The Great Wall Of China (S01E03)

On Asia's vast continent, the Great Wall of China stretches across the land from east to west, yet its full story remains elusive. With cutting-edge digital technology, contemporary experts are able to examine this UNESCO World Heritage site from every angle and distance, whether far away or up close. Delving into its history, science, and construction techniques, they analyze the efforts of ancient builders in hopes of uncovering secrets that have been hidden for thousands of years.