Camping inside Son Doong Cave, the largest cave in the world.
Son Doong Cave in Quang Binh, Vietnam, is recognized as the largest cave in the world. Discovered in 1991 and explored in 2009, the cave contains enormous chambers, underground rivers, and even a jungle ecosystem inside. Adventure expeditions allow visitors to camp within the cave while surrounded by towering limestone walls and natural skylights where sunlight enters through collapsed ceilings.