ĐIỀN TỪ THÍCH HỢP Phong Nha-Ke Bang is a national park and UNESCOs World Heritage Site in the Bo Trach and Minh Hua Districts of central Quang Binh Province, in north central Vietnam, about 500km (1) of the nations capital, Ha Noi. Phong Nha-Ke Bang area is noted (2) .. its cave and grotto system as it is composed of 300 caves and grottos with a total length (3) about 70km, of (4) only 20 have been surveyed by Vietnamese and British scientists; 17 of (5) . are located in the Phong Nha (6) . and three in the Ke Bang area. Phong Nha (7). several world cave records, as it has the longest underground rived, as well as the largest caverns and passageways. The park derives its name from Phong Nha cave, the most beautiful off all, containing many fascinating rock (8).., and Ke Bang forest.The plateau of which the park is (9).. is probably one of the finest and most distinctive examples of a complex karts land form in Southeast Asia. This national park was (10) . in UNESCOs World Heritage Sites in 2003 for its geographical values