Tien Son Cave

Tien Son Cave is a dry cave located above Phong Nha Cave within Phong Nha-Ke Bang National Park in Son Trach Commune, Bo Trach District, Quang Tri Province. Discovered in 1935, the cave extends about 980 meters and is known for its stalactites, stalagmites and stone formations. Accessed by boat on the Son River followed by a climb of about 330 steps, it is part of the UNESCO World Heritage site and visited together with Phong Nha Cave.

Visitors reach Tien Son Cave by boat on the Son River to the Phong Nha Cave pier, then climb approximately 330 stone steps to the cave entrance at about 200 meters above sea level. Inside, visitors walk along a paved path through a 980-meter dry cave with illuminated stalactites, stalagmites, draperies and chambers. The cave is not inhabited and has no river inside, offering quiet viewing, photography and panoramic views of the surrounding karst landscape and Son River valley from the entrance area.

Tien Son Cave was discovered in 1935 and later surveyed as part of the Phong Nha cave system. It is a dry fossil cave formed millions of years ago in the Phong Nha-Ke Bang karst, and together with Phong Nha Cave it contributed to the designation of Phong Nha-Ke Bang National Park as a UNESCO World Heritage Site in 2003 for its geological and geomorphological values.

Located within Phong Nha-Ke Bang National Park, Tien Son Cave is valued as a natural heritage attraction showcasing the karst landscape of central Vietnam. It is traditionally visited together with Phong Nha Cave and is an important site for nature-based tourism and education about cave geology in Quang Tri Province.