Nestled in the heart of the Phong Nha-Ke Bang National Park in Quang Binh Province, Vietnam, lies Son Doong Cave. Known to be the largest cave in the world, Son Doong has been a mesmerizing attraction for explorers and geologists worldwide.Discovered in the early 1990s by a local farmer, the cave's massive chasm—big enough to house an entire city block—has since become a focal point for tourists a...More