板留温泉 is a hot spring town in Aomori, Japan. The water leaves the ground at 60°C, hot. Officially the water is classed as chloride spring and sulfate spring. 6 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.
40.6057, 140.6830 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.