Also known as Yong Ning Gate, this is the most impressive of the 13 gates leading through Xian's 39-foot-high city walls. This was the original site of Tang Dynasty fortifications; the walls you see today were built at the beginning of the Ming Dynasty, and they include the country's only remaining example of a complete wall dating to this dynasty. Biking the entire 13.7-km (8.5-mile) route atop the walls takes about 90 minutes. Rental bikes are Y40 for 100 minutes, and
you must put down a Y200 deposit. Open-air electric cars cost Y80.
Nan Da Jie, Xian, 710002, China