Từ khóa: #British Royal Caves Association

Tien (Fairy) cave

Detailed map for 404 caves of Phong Nha cave system created

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 in the North Central region, said the park’s director Pham Hong Thai.