sites of natural (30)__________ and tropical dense forests. It is also rich in large, often spectacular and scientifically significant caves, including Son Doong - the world's largest cave.

The Phong Nha – Ke Bang National Park, which covers over 123,000ha, is home to (29)___________  terrestrial and aquatic habitats, primary and secondary forests, sites of natural (30)__________ and tropical dense forests. It is also rich in large, often spectacular and scientifically significant caves, including Son Doong - the world's largest cave.