Phong Nha Cave is a cave in Phong Nha-Kẻ Bàng National Park, a UNESCO World Heritage Site in Quảng Bình Province, Vietnam. It is 7,729 metres long and contains 14 grottoes, as well as a 13,969 metre underground river.
Paradise Cave was discovered by a local man in 2005 and the first 5 km of this cave was explored by explorers from British Cave Research Association in 2005, the whole 31.4 km was explored and publicly announced by the British cave explorers.
This cave is 31.4 km long, longer than Phong Nha Cave which had been considered the longest cave in this national park. The height can reach to 72 m and 150 m wide. The limestone formation is also more spectacular than that of Phong Nha Cave.