The City Wall(chin. 城墙, Pinyin: Chěngqiáng), which was begun in the Han Dynasty, a century before the Christian era, and is now the largest and most well-preserved ancient wall, existing in China.

The City Wall is an extension of the old Tang Dynasty structure, stretches out in a rectangular shape and is about 13.7 km in circumference. This wall stands 12 meters high, 12-14 meters wide at the top and 15-18 meters wide at the base. A total of 5,894 crenels are built along the outer edge of the wall, each of its for corners is topped by a turret, and a main gateway is built into each side of the wall. The top of the wall has been converted into a promenade, so that visitors can take a stroll on the wall while feasting their eyes on the scenery in sight.