Xuanwu Lake is located outside the northeastern city wall, connected to the city by Xuanwu Gate and Jiefang Gate. It was called Sangpo before the Sixth Dynasty and Beihu during the Jin Dynasty, and was a place to train the navy. Historically, in addition to training the navy, it has been a playground for emperors and ministers, and was opened as a park in 1909. At that time, it was called Yuanwu Lake Park, and was also called Wuzhou Park and Houhu Lake. Inside the lake, there are the Ring Chau, Cherry Chau, Liang Chau, Cui Chau and Ling Chau, and each of the five continents has its own characteristics. The shore of Xuanwu Lake is in the shape of a diamond, with a circumference of about 10 kilometers, covering an area of 437 hectares and a water surface of about 368 hectares. There are five islands in the lake, dividing the lake into four large pieces, with bridges or embankments connecting the islands, making it easy to visit. The depth of the lake is not more than 2 meters, and fish are raised in the lake and lotus flowers are planted in the lake. In summer and autumn, the surface of the water is turquoise, and pink lotus flowers are covered in it, which makes the lake full of fragrance and charming scenery. Transportation: opposite to Nanjing Railway Station, you can take a cruise to Xuanwu Lake Park. 304 Road to Xuanwu Lake Liberation Gate (Taicheng), Tour 1 Road, 1, 3, 8, 22, 25, 28, 30, 33, 35, 38, 52, 56 bus to Xuanwu Lake Park. Tickets: Free admission to the lakeside road, 20 RMB for Xuanwu Lake Park. Boat rental: 15 RMB/hour for small pedal boats, 25 RMB/hour for large pedal boats, 30 RMB/hour for electric boats. A deposit of 50 yuan is required.

The ancient city wall of Nanjing, which is closely related to the Qinhuai River, is a symbol of history. The Nanjing City Wall is 33.5 kilometers long, with a height of 12 meters or more and a thickness of 7.62 meters to 12.19 meters. City to granite as the foundation, giant bricks for the wall, each brick side of the stone have brick maker's county government offices and the year, month and day, the same specifications, built with lime, tung oil, glutinous rice juice mixed with mortar, very strong, standing for hundreds of years, towering. Walls on the towers 2000, 24 gates. The better preserved ones are Zhonghua Gate in the south of the city, Yijiang Gate in the northwest, Xuanwumen Gate in the northeast of the city, and Zhongshan Gate in the east of the city. Yingtianfu the main south gate - China Gate is known as Jubao Gate, is the largest gate on the wall of Nanjing, is also China's largest castle. The building shape like an urn, so also known as the urn door, is designed specifically to defend against enemy attacks. The urn city project is majestic, complex structure, the city is divided into two layers, the door has four, built 27 hiding holes, can hide 3000 soldiers. it is China's largest urn city, now has a urn city history showroom. The scale of Nanjing's ancient city wall is the first in the world, and it is a masterpiece in the history of China's ancient architecture. Transportation: It can be reached by Tour 2, Tour 4, 2, 16, 26, 33, 49, 88, 101, 102 buses. Admission: 15 yuan?