The mysteries of Vietnam's 'Cave Kingdom' are gradually being revealed.
- 4 days ago
- 3 min read
The expedition team has just discovered a new cave entrance in the Sinh Ton valley area, which is of particular importance, identified as the ancient waterway of the Hang Toi River. The cave is large in scale and contains many stalactites.
The survey took place from March 21st to April 11th, 2026, in various areas of Phong Nha-Ke Bang National Park and related locations, including Phong Nha, Thuong Trach, Kim Phu, Kim Dien, Tan Thanh, Tuyen Lam, and Truong Son. With the participation of the British cave exploration team and domestic support forces, the team surveyed a total of 29 caves, including 26 new caves and extensions of 3 previously known caves, with a total measured length of 13,643 meters.
Many large-scale caves with high scientific value were recorded. Notable among them are Thien Cung Cave, with a length of 4,206 meters – the longest in the survey; Nuoc Lan Cave, 2,721 meters long; and Ma Dom Cave, 1,257 meters long. Along with the 583-meter-long Cha Ngheo cave, with its complex structure and vertical well-like entrance, it opens up the possibility of developing into a large-scale cave system.
In particular, the discovery of a new cave entrance in the Sinh Ton valley area is of special importance, identified as the ancient flow path of the Hang Toi River. The cave is large in scale, contains many stalactites, developed almost parallel to the Hang Toi system, and has a hydrological connection with the Chay River.
Beyond their scientific value, many discoveries also suggest the potential for developing new tourism products. Some caves and areas, such as the underground stream cave system at Ruc Mon or Mo Roo cave, are considered suitable for adventure tourism and nature-based experiential tourism. However, experts also emphasize the urgent need for environmental management and protection, as well as adjustments to exploitation methods to ensure the long-term sustainability of the heritage site.
International experts highly appreciate the survey results achieved, while affirming that Phong Nha-Ke Bang National Park still has much unexplored potential. These new discoveries further contribute to affirming Phong Nha-Ke Bang's position as one of the world's leading and most valuable karst areas.
According to Mr. Pham Hong Thai, Director of the Phong Nha-Ke Bang National Park Management Board, through more than 30 years of collaborative surveys and research with international experts, the Phong Nha-Ke Bang cave system has been continuously discovered, expanded, and clarified. To date, the area has recorded more than 472 caves with a total length of over 254 km, becoming one of the world's richest and most unique karst regions, earning the title of "Kingdom of Caves".
Phong Nha – Ke Bang National Park is one of Vietnam's most outstanding natural world heritage sites, recognized by UNESCO for its rare geological, biological, and landscape values. Located in the heart of the majestic Truong Son mountain range, it is a convergence point of pristine nature and the profound cultural and historical values of the former Quang Binh region.
The harmonious combination of limestone mountains, primeval forests, underground rivers, and fantastical cave systems creates a magnificent natural landscape. Visitors to Phong Nha - Ke Bang not only admire the spectacular beauty of the heritage site but also experience an emotionally enriching journey of discovery, where humanity and nature blend together.
Tourist activities in Phong Nha – Ke Bang are diverse and suitable for many types of visitors. Those who prefer a gentle experience can take a boat trip along the Son River, admire the peaceful scenery, and explore Phong Nha Cave and Tien Son Cave. For adventurous tourists, trekking through the forest, crossing streams, and conquering En Cave, Tu Lan Cave, or Son Doong Cave offers a challenging and exciting experience.
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