南網張ありね温泉 is a hot spring town in Iwate, Japan. The water leaves the ground at 67.7°C, hot. It measures pH 7.5 — close to neutral. Officially the water is classed as chloride spring, bicarbonate spring and sulfur spring. Its sources put out around 46 litres a minute. 1 inns take visitors here.
Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.
Smooth, slightly slippery water. Often nicknamed bihada-no-yu, the water for beautiful skin.
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
Figures from the town's Japanese Wikipedia article.
39.7950, 140.9511 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.