Great Corner Tower · 大角楼
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The Great Corner Tower is the first watchtower on the eastern section of the Mutianyu Great Wall, perched on a ridge at approximately 600 meters elevation. It earned its name because three sections of the wall converge here at a sharp angle, forming a dramatic corner. Originally constructed during the Hongwu reign of the Ming Dynasty under the supervision of General Xu Da, it was later reinforced by renowned commanders Tan Lun and Qi Jiguang. The tower features a unique three-arch connected design, serving multiple functions including lookout, defense, and troop billeting. From its summit, visitors can gaze eastward to see the Jiankou Great Wall snaking like a dragon across the peaks, southward to view the Mutianyu pass in its entirety, and northward over verdant valleys. As a critical node in the Great Wall defense system, it commanded a strategically vital position and remains a precious physical relic for the study of Ming Dynasty frontier military engineering.