Paradise Cave

Thien Duong Cave (Paradise Cave) is a cave in Phong Nha-Ke Bàng National Park, a UNESCO World Heritage Site located 60 kilometers northwest of the city of Dong Hoi. The cave was discovered by a local man in 2005, and the first 5 kilometers of it were explored by explorers from the British Cave Research Association in 2005; the entire 31 kilometers were explored and publicly announced by the British cave explorers in 2005. This cave is 31 kilometers long, making it longer than Phong Nha Cave, which was previously thought to be the longest cave in this national park.