active volcanoes
asia
attractions
crater
crater marks
explore
explosion crater site
hiyoriyama
hokkaido
hot springs
japan
jigokudani walking path
journey
landscape
natural
natural landscape
nature spot
noboribetsu
noboribetsu onsen
noboribetsushi
okunoyu
ooyunuma
spa town
steam
sulfur
sulfur springs
summer
swamp water
the kettle of hell
tourism
tourist attractions
trail
travel
views
volcanic gas
volcanic plume
volcano
water vapor
white smoke