The Initial Discovery
Ho Khanh was just a local man who lived in a remote part of Vietnam. In order to get by, he would spend most of his days walking and navigating through the jungles of Phong Nha-Ke Bang National Park. His days would consist of searching for food. Other times, he would spend time searching for timber that he can sell to his fellow locals.
One day in 1990, Khanh was on his routine walk. When a storm was rapidly approaching, Khanh was far away from any safe shelter. He had discovered an opening in a limestone cliff. The opening was spewing out clouds, taking Khanh by complete surprise and preventing him from seeing inside.