Umi is a steamy blue due to iron oxide in its 98°C water. It's said to be about 200m down to the source. One of the Kannawa group's jigoku (hells; boiling hot springs).
Umi Jigoku
Beppu
Beppu
Umi is a steamy blue due to iron oxide in its 98°C water. It's said to be about 200m down to the source. One of the Kannawa group's jigoku (hells; boiling hot springs).