Tham khảo nhé em ( Giới thiệu về Phong Nha - Kẻ Bàng)
Phong Nha - Ke Bang is a national park in the center of Quang Binh province in north-central Vietnam. It protects one of the world's two largest karst regions with several hundred caves and grottoes. The park deprives it name from Phong Nha cave, the most beautiful of all, containing many fascinating rock formations, and Ke Bang forest. The plateau is probably one of the finest and most distinctive examples of a complex karst landform in Southeast Asia.
***Good luck ~ MDia
Phong Nha - Ke Bang National Park is a aUNESCO World Heritage Site , located in Bo Trach and Minh Hoa Districts of central Quang Binh Province, in north-central Viet Nam . Phong Nha - Ke Bang is famous for its cave sytems . It has 300 caves with a total length of abot 70 km , of which only 20 have been surveyed by Vietnamese and British scientists. The park contains many fascinating rock formations and Ke Bang Forest . Trvelers hould take a boat ride through undergound rivers to experience nature and enjoy fresh air .
Đây là bài mà mình nghĩ bạn nên tham khảo ! Chúc bạn học tốt ! 
