Thanh Thuy Hot Mineral Water Tourist Area

The Thanh Thuy hot mineral water area lies in La Phu commune, Thanh Thuy district, about 65 kilometres northwest of Hanoi in Phu Tho province — the region traditionally regarded as the ancestral homeland of the Hung Kings. The underground mineral field, estimated to hold around 20 million cubic metres of water, is tapped through wells 30 to 60 metres deep, with source temperatures reported up to 53°C and bathing pools generally kept between 35°C and 42°C. The water is calcium- and magnesium-rich and has been noted in Vietnamese press for containing natural radon, a rarer mineral profile among the country's springs. Several independently operated resorts and bathing facilities now draw on the same underground source across the district.