Ban Gioc-Detian Falls, Vietnam/China

Ban Gioc–Detian Falls straddles the Vietnam–China border on the Quây Sơn River, cascading roughly 30 metres over limestone karst in a series of tiers and forming one of Asia's widest waterfalls. Its pastoral setting of karst peaks and working rice paddies offers a quieter, more rural spectacle than more heavily developed falls elsewhere on this list, with local farmers visible year-round. Flow is strongest during the summer rainy season and drops significantly by winter, when the falls narrow considerably.