Phong Nha Cave is a cave in the limestone mountains of Phong Nha-Ke Bang National Park. Quang Binh is an attractive and famous destination. The cave has been used for tourism activities since 1991. Tourists, after going upstream of the Son River, visit Phong Nha Cave, which has a magnificent system of stalactites with seven outstanding characteristics. Here, visitors can choose from two Phong Nha tours: Phong Nha Cave 1,200m tour and the Son Ho 4,500 m tour.