Koganeyu Onsen is a hot spring town in Hokkaido, Japan. The water leaves the ground at 30°C, cool enough that the baths here are usually reheated. Officially the water is classed as sulfur spring. 2 inns take visitors here.
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
More photographs
From Wikimedia Commons. Tap a photo for the photographer and licence.
With tattoos
Many public baths still turn away visible tattoos, and the rule is set by each bath, not by the town. The reliable way round it is to bathe privately: a room with its own open-air bath, or an inn with a private bath you can book for yourselves.