Historian Dan Snow has released a documentary examining the construction and significance of the Great Wall of China, described as the largest building project ever undertaken. The documentary traces the wall’s extensive route from China’s eastern coastline to the deserts of the far west, including a notable segment near Beijing.

Snow’s exploration delves into multiple facets of the wall’s history, combining engineering analysis, social context, and political-military considerations. The documentary investigates the reasons behind the wall’s construction, primarily its role in defense and border control, while addressing popular misconceptions surrounding the structure. One such myth, widely believed, is that the Great Wall is visible from space—a claim that the documentary refutes.

By traveling the diverse landscapes along the wall’s path, Snow provides viewers with a comprehensive perspective on the wall’s monumental scale and enduring legacy. The film also highlights changes in construction techniques and the wall’s impact on the communities along its length.

The documentary aims to shed new light on an enduring symbol of Chinese history, offering a balanced understanding of both its practical purposes and cultural significance through a detailed narrative woven from historical records and modern scholarship.