Under the ground in Vietnam is a natural wonder that is absolutely stunning. Son Doong is the world’s largest cave. In fact, it’s so big that you could fit a half-block’s worth of 40-story buildings inside it! It stretches for over 3 miles and in parts of the cave, there are stalagmites 230 feet (70m) high! The cave even has it’s own weather! Sitting under a 985-foot (300m) skylight is a lush rainforest home to critters that have yet to be discovered by science. We’re not sure if the cave is open to backpackers like us (or if you have to be a National Geographic genius to get in) but we’re crossing our fingers we can explore some of it when we visitVietnam on our trip around the world!
Fore more information and other pictures, check out this National Geographic Article: