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Detailed map for 404 caves of Phong Nha cave system created Chia sẻ | FaceBookTwitter Email Copy Link Copy link bài viết thành công 14/01/2021
09:23 GMT+7 After some 30 years of research, experts from the British Royal Caves Association (BCRA) has created a detailed map for 404 caves that have staggering length of 231km in Phong Nha-Ke Bang National Park in Quang Binh Province. Tien (Fairy) cave. Of which, there are many caves containing information of the process of Earth formation over 400 million years ago. The Phong Nha cave system has 157 caves with a length of 103km. The specialists made surveys of 58 grottos measuring 48km and 20km of the 60-cave Nuoc Mooc system. Outstanding caves are Phong Nha, Tien Son, Son Doong, Thien Duong, Va, and En. ....