Set in a forested landscape of karst limestone peaks southwest of the village of Son Trach, this UNESCO World Heritage national park also located in the north central coast region is known for its network of some 300 caves and grottoes, extending around 44.5 kilometres (28 miles). Most visitors only get as far as the first kilometre and a half, but even this is spectacular and its scale breathtaking; wooden staircases descend into a cathedral-like space with colossal stalagmites and glimmering stalactites. Get here early to beat the crowds, as during peak times (early afternoon) tour groups arrive with guides using megaphones. The park is reachable by air/driving in just under four hours.

It´s one of Tripatini contributor Adventure Journey´s 10 of the Coolest Experiences You Can Have in Vietnam.