Camping in the 3rd Largest Cave in the World

Phong Nha-Ke Bang National Park in Vietnam is famous for its cave and grotto systems, composed of nearly 300 caves.  In fact, it is home to the world’s largest cave, Son Doong.  For the very unaffordable price of $3000, you can explore this cave for 5 days and 4 nights.  If you are interested in big caves, […]