Where is the world’s largest cave by volume located?

The world’s largest cave by volume is the Son Doong Cave, located in Phong Nha-Kẻ Bàng National Park in Vietnam. Discovered in 1991, it has since been explored and found to stretch over 5 kilometers (3.1 miles) in length. The cave’s volume is estimated to be about 38 million cubic meters (1.3 billion cubic feet), making it the largest cave by volume. Son Doong Cave features its own ecosystem, with jungles, rivers, and unique geological formations inside. It is also home to rare species of animals and plants.