Where else in the world can you explore some of the world's most spectacular caves; kill your own chicken and then eat it and get a duck pedicure, all in one day? I'll forgive you if you've never heard of Vietnam's Phong Nha-Ke Bang National Park. Neither had I until very recently. Having spent five incredible days there with my family, it is without a doubt one of the most breathtaking and exciting adventure destinations yet to be discovered by the rest of the world. Find out why it should be on your Vietnam itinerary.