Quang Binh Province in central Vietnam has opened more of its world famous caves to tourists, introducing two new ones with spectacular limestone structures.
Oxalis, the only company to provide tours to the world’s largest cave Son Doong (Mountain River) and others in the Phong Nha – Ke Bang National Park, started taking visitors into Va and Nuoc Nut caves this month.
The two are unique as their limestone pillars rise up from the bottom of lakes. Stalagmites are formed when calcium salts are deposited by dripping water.
An Oxalis source said the trip through the caves is around 10 kilometers long. Visitors will have to swim 500 meters through a stream from the entrance in darkness. The water is around one meter at the deepest point.
There is a 15-meter-high stone wall and one needs to use a harness and ropes to scale it.
But then one is rewarded with the magical scene of thousands of limestone pillars rising from the lake.
The company said the tour would be available between February and August, with a night spent inside the caves.
The caves are located at the core of the park. Members of the British Cave Research Association explored the caves in 2000 with the help of local man Ho Khanh.
They said the stalagmites are unique but also vulnerable.
Tourists must follow instructions about keeping a distance from them or they could endanger geological formations millions of years old, they warned.