Dark cave- Paradise Cave daily tour is an amazing experience. Kayaking over the river to get there, walking through the dark with only the head touch on your mining helmet. In addition, you will have a chance to have a mud fight in the mud baths deep in the cave and then washing clean with a swim in the lake inside the cave.
Activities: Muddy bath, zip lining, swimming, kayaking, soft caving and jungle walking
Maybe its the unfathomable amount of time, maybe it’s the natural process of erosion and the complete absence of human intervention. Maybe it’s that caves are only starting to be discovered on a planet where humans have existed for thousands of years. Walking through, or swimming through, all of the caves in Phong Nha - Ke Bang national park is definitely highlight of Vietnam.