Built during the Tang Dynasty, when the city, Chang’an, was capital, the wall is the only complete city wall extant in China. The rectangular wall is 11.9 kilometers long, 12 meters high, 12 – 14 meters wide on top, and 15 – 18 meters wide at the base. There are 5,894 crenels along the exterior wall, but no crenels on the interior side. Turrets are at the four corners. Each side has a gate. On top of the gates are main towers and watchtowers. A moat protects the perimeter. You can take a walk on the wall or go fishing by the moat.
