Bang Onsen Spa & Resort

Bang Onsen Spa & Resort is built around Suoi Bang, a natural spring field in Kim Thuy commune, Le Thuy district, about 60 kilometres southwest of Dong Hoi near the edge of Phong Nha-Ke Bang National Park. The spring emerges through roughly 200 vents at a stable flow of 15-19 litres per second, with a recorded source temperature of about 105°C — the highest documented for any hot spring in Vietnam — carrying calcium and other dissolved minerals at concentrations of around 550-570 milligrams per litre. Developed by Truong Thinh Corporation and opened in August 2023, the resort cools the water into soaking pools of roughly 40-45°C, styled around Japanese onsen bathing traditions and set within forested limestone karst scenery.