英文關鍵字
volcano
steam
smoke
geothermal
eruption
fumarole
sulphur
sulfur
geyser
spring
tourism
hot
thermal
negros
gas
fumes
philippines
landscape
crater
mist
valencia
mountain
volcanic
scenery
dangerous
slope
travel
nature
outdoor
adventure
tropical
caldera
vacation
outdoors
hill
activity
geology
scenic
heat
rock
mineral
tree
natural
dirty