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Xi’an, China
About 3,000 years old, Xi’an is the oldest city in China, and its 644-year-old walls are some of the best preserved in the country. They were built during the Ming Dynasty—along with a moat and network of drawbridges, watch towers, and gates—and have been refurbished several times since then. Today, visitors can walk, bike, or rent an electric golf cart to explore Xian’s 9 miles of walls.
