川北温泉 is a hot spring town in Hokkaido, Japan. Officially the water is classed as chloride spring and sulfur spring.
Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
43.7019, 144.9136 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.