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The Dujiangyan Irrigation System, built over 2,200 years ago in China, is the world's oldest and only surviving no-dam irrigation system, which means it does not rely on a dam to control the water flow. 2. One hidden gem is the Fish Mouth Levee, shaped like a fish's mouth, where fishes take refuge during floods, and it also serves as an emergency spillway to protect the irrigation system. 3. The Dujiangyan Irrigation System is so well-designed that it effectively prevents flooding and distributes water evenly to nearby fields, helping farmers grow crops and boosting agricultural productivity. 4. According to a local legend, Li Bing, the ancient engineer who designed the system, used a dragon to determine the best location for the diversion channel, making it a fascinating part of the region's folklore. 5. The Dujiangyan Irrigation System is not just an engineering marvel but also a tourist attraction, offering picturesque landscapes, ancient architectural structures, and serene riverside paths for visitors to explore and admire.
