Great Wall of China
The Great Wall of China is a series of fortifications built across northern China over many centuries to protect against invasions, stretching for thousands of miles.
Rather than a single continuous wall, the Great Wall is a network of walls, trenches, and natural barriers built by successive Chinese dynasties, with the earliest sections dating back over 2,000 years. Much of what stands today was built or rebuilt during the Ming Dynasty (1368-1644).
The wall was constructed using a range of materials depending on region and era, from rammed earth to brick and stone, and required immense labor, with historical accounts describing hundreds of thousands of workers involved.
Contrary to popular myth, the wall is not visible to the naked eye from space. It was designated a UNESCO World Heritage Site in 1987 and remains one of the most visited landmarks in China.