Ban Sam Waterfall - Unique destination in Cao Bang. Ban Sam Waterfall is located about 3 km from Highway 3, about 56 km from Cao Bang city, hidden behind Khau Chia mountain, in Ban Sam hamlet, former Luong Thien commune (now Hoa Thuan town), Quang Hoa district , Cao Bang province. The waterfall is located on Sam Xuyen stream, a small branch merging into Bang river.