Son Nu Cave. (Photo: VNA/VNS)

Locals in Truong Son commune are behind the discovery, and they call the area the Son Nu (mountain girl) cave.

The cave is some 1.8 kilometers long, with a width ranging from 20m to 50m and an average height of about 35m.

To reach its location, people need to cross about 7km of convenient transportation and 2km of a trail alongside a stream.

It features an underground stream originating from the Vietnam-Laos border. In summer, the water level inside the cave is not significant, allowing local residents to paddle through. The boat journey from its entrance to exit takes a little over an hour.

Quang Binh is home to Son Doong Cave considered to be the world’s largest and most beautiful natural cave by the World Records Union and the World Records Association.