Top activities in Chengdu
Top Chengdu landmarks
Top Chengdu landmarks tickets
Top Chengdu categories
Explore Chengdu and beyond
Nearby Chengdu tours
Popular tours in Southwest China
People also visited
Trip Inspiration
Originally built in 256 BC, the Dujiangyan Irrigation System is the world’s oldest non-dam irrigation facility. A marvel of engineering, and now a UNESCO World Heritage Site, Dujiangyan uses the natural topography of the region, as well as hydrological features of the river, to irrigate 1.65 million acres (668,700 hectares) of farmland.