The Xiling Gorge is one of the Three Gorges on the Yangtze River. It is 76 kilometers long, stretching from the Xiangxi stream to Nanjin Pass in Yichang. It is the longest and most difficult one of the three gorges to pass on the Yangtze River. Its channel is full of shoals, whirling pools and submerged reefs, making the water run in different directions. Tourist attractions include the Book on Art of War and Sword Gorge, the Cattle Liver and Horse Lung Gorge, the Lamp Shadow Gorge, the Black Shoal and the Discharge Water Shoal.