(Sadie’s post from backpacking with her brothers through southeast asia for two months) Vietnam cave hike. Tu Lan Cave System in Phong Nha-Ke Bang National Park. This 12 hour hike traverses over and through two mountains. Part of the hike includes swimming through pitch black caves in ice cold water on a freezing day, fully clothed. Needless to say, I ended up with pneumonia by the end of the trip and when we got back to Thailand I spent a week in the hospital.
