With the help of local people, a group of British Cave Royal Association (BCRA) members discovered the cave system in 1997. In the system lies a large sinkhole, named Kong Collapse.

The Vietnamese tour agency Jungle Boss has recently discovered a new route inside the mysterious Kong Collapse, the highest sinkhole in Vietnam which lies inside the Phong Nha-Ke Bang National Park, opening a potential trekking route in Quang Binh province for adventure lovers. 

Kong Collapse, the highest sinkhole in Vietnam is a drawing attraction for many Vietnamese tourists and foreigners alike. The magnificent beauty of the sinkhole can be felt even just through the series of photos provided by Jungle Boss, the Vietnamese agency dedicated to Phong Nha - Ke Bang tour.