Officially recognized as a Unesco World Heritage in 2003, Phong Nha Ke Bang National Park really attracts visitors by a majestic beauty of pristine forests and limestone mountains formed thousand years ago. With an area of 200,000 hectors, this destination is renowned as the kingdom of caves including 300 caves with distinct features. Every places of the national park always hides the mysterious things that encourage the curiosity for visitors’ mind.