荒川温泉 is a hot spring town in Aomori, Japan. The water leaves the ground at 80°C, hot enough that it has to be cooled before anyone can get in. Officially the water is classed as chloride spring and sulfate spring. 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.
Clear water with a faintly bitter taste. Known for holding heat.
Figures from the town's Japanese Wikipedia article.
40.6456, 140.8522 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.