Tại vườn quốc gia Phong Nha Kẻ Bàng đã phát hiện khoảng 300 hang động lớn nhỏ, trong đó nổi bật như hệ thống động Phong Nha, động Thiên Đường, hang Én, hang Sơn Đoòng lớn nhất thế giới
In Phong Nha Ke Bang National Park has discovered about 300 large and small caves, one of which featured a Decent dynamic system, the Heavens, hang hang Sơn Đoòng, Martin in the world
At the national park Phong Nha Ke Bang was discovered about 300 large and small caves, which highlights as Phong Nha cave system, dynamic Paradise, En Cave, the largest cave Son Doong world
In Spain's Eagle Peak National Park, found a small cave of about 300 people, which is the system automatically start to start the wind ah, heaven's swallow hole, the world's largest landscape hole