It is located in the Phong Nha-Ke Bang National Park. To get inside the cave, you take a boat and cruise the river for about 30 minutes. Then follow the river under a rock and from there continue through the mountain.

Even though we only went for about 1500m out of it’s total length of 7.8kms, the feeling was very unique. Just like in Tomb Rider, only for real!

The boat trip ended at an underground shore. From there we continued afoot through the corridors.