Kusatsu

Steaming volcanic crater with turquoise bubbling water

Vivid turquoise crater lake of an active volcano

Natural hot spring with steamy sulfur-rich waters

Steam rising from hot springs beside a cool mountain river

Hidden waterfalls cascading into crystal-clear pools.

Vibrant blue volcanic lake with steaming surroundings

Obscure pull-off reveals rolling mountains around Kusatsu

Vibrant blue volcanic lake in a secluded crater

Natural hot spring with warm streams in a stunning setting