Our Son Doong Cave Expedition will take you deep into the heart of Phong Nha Ke Bang National Park in Quang Binh Province, Vietnam, on one of the most thrilling adventure tours in the world. With our team of more than 25 porters, safety experts and guides, you’ll explore over five days the entire length of Son Doong Cave, Hang En Cave, as well the Ban Doong ethnic minority village.