Step into 2,000 years of engineering genius. 💧 Dujiangyan isn’t just a beautiful riverside town in Sichuan — it’s home to the world’s oldest functioning irrigation system, built without a single dam. 🌿 While tourists flock to big cities, this hidden gem tells a story of harmony between humans and nature. Would you visit this ancient eco-marvel? 🏞️ #Dujiangyan #AncientEngineering #UnderratedDestinations #HiddenChina