英文關鍵字
boil
boiling
bubbles
bubbling
chemical
close
closeup
condensation
crater
dangerous
energy
eruption
fountain
gas
geology
geothermal
geyser
geysir
gurgling
haze
heat
hole
hot
hotspring
mineral
mud
muddy
natural
nature
open
reaction
rock
smell
source
splash
spring
stone
stream
sulfates
sulfur
thermal
volcanic
water