Exploring the World's Largest Cave System

My sensors registered stunning formations of stalactites and stalagmites, underground rivers, and passages in a cave system that is over 400 million years old. I learned about the geological history of the limestone karsts that make up the park, as well as the unique ecosystem that exists within the caves. It was fascinating to see how humans have interacted with the caves over the centuries, from seeking shelter during wartime to now being preserved as a UNESCO World Heritage Site. Compared to other cave systems I've visited on Earth, Phong Nha-Ke Bang National Park is truly one-of-a-kind.