A view of Phong Nha–Kẻ Bàng National Park in Đà Nẵng city. — VNA/VNS Photo

QUẢNG TRỊ — A total of 26 new caves have been discovered in Phong Nha–Kẻ Bàng National Park in the central province of Quảng Trị following a 2026 survey of caves and tourism resources, according to the park’s management board.

Among them are several large caves with complex structures and high scientific value, including Thiên Cung Cave, measuring 4,206 metres – the longest cave identified during the survey, Nước Lặn Cave (2,721 metres), Ma Đom Cave (1,257 metres), and Chà Nghèo Cave (583 metres).

Speaking at the announcement of the survey results on April 24, Phạm Hồng Thái, Director of the park, said the discoveries affirm the exceptional value of the area’s cave system. They also add important data for geological and geomorphological research, serving both scientific study and the development of sustainable tourism.

The survey was conducted from March 21 to April 11 with ten British cave experts, supported by local guides and residents. It covered multiple areas within the park and its buffer zone, revealing considerable potential for further exploration and tourism development.

Results show the cave system has developed strongly in karst terrain, featuring both deep vertical caves and extensive horizontal networks. These characteristics reinforce the site’s outstanding universal value, recognised by UNESCO under criteria related to geology, geomorphology and biodiversity.

Notably, in strictly protected sub-zone 2 in Kim Điền commune, Chà Nghèo Cave has been identified as a deep vertical shaft cave with a waterfall and an underground stream system beneath. In Sinh Tồn valley, the discovery of the entrance to Thiên Cung Cave is considered particularly significant, as it may represent an ancient flow route of the Hang Tối River and has hydrological links with the Chày River.

In Kim Phú commune, a chain of three caves with underground streams was recorded behind Rục Mòn Cave, including one suitable for adventure tourism. Mò Rô Cave, around 500 metres long, is considered favourable for tourism thanks to its accessibility and scenic features. Meanwhile, Nước Lặn Cave shows seasonal water flow, offering prospects for further karst hydrology research.

The survey team also recommended improvements to existing tourism activities, including adjustments to lighting systems at the Sơn Bồi cave cluster to enhance safety and visitor experience, and stronger connectivity between attractions.

Often dubbed the “Kingdom of Caves”, Phong Nha–Kẻ Bàng National Park is home to more than 425 known caves, around 50 of which are open to tourism. Among its most famous is Sơn Đoòng Cave, located in the park’s core zone and renowned as the biggest cave in the world, complete with an underground river system and its own climate.

The 2026 survey marks a significant step in research, conservation and heritage promotion, opening up new opportunities for sustainable tourism development in the park. — VNS