Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Dong Trung Hot Springs is located in Quảng Ninh Province, Vietnam. This iron-rich thermal spring flows at around 40°C, feeding indoor and outdoor (rotenburo) baths plus a sauna, in the country's northeast.
Insider tip — Quảng Ninh province in northeastern Vietnam is defined by its extraordinary seascape — Hạ Long Bay, a UNESCO World Heritage Site of 2,000+ limestone karst pillars rising from emerald water, is one of the world's most iconic natural landscapes. The Dong Trung iron-rich hot springs in the province's forested interior draw on volcanic geology beneath one of Southeast Asia's most scenically dramatic provinces, providing thermal bathing in the mountain hinterland above the legendary bay.