In 1991, A farmer who was wandering around explored a cave located in the Phon Nha-ke Bag National Park in Vietnam. Locals in the area named the cave Son Doong, which means mountain river cave.
in 2009, Howard Limbert and a group of British scientists decided to locate and explore the cave. When they stepped inside, they were shocked of what they found, over 3 miles long and 492 feet wide, Son Doong is the largest cave in the world. I guess this isn’t a normal cave, it’s a total mini world!
See for yourself what an amazing cave this is.