Photo: Mizunoumi · CC BY-SA 3.0 · Wikimedia Commons
三浦マホロバ温泉 is a hot spring town in Kanagawa, Japan. The water leaves the ground at 36.2°C, comfortably warm. Officially the water is classed as chloride 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.
Figures from the town's Japanese Wikipedia article.
35.1851, 139.6509 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.