英文關鍵字
active
activity
alternative
area
colorful
crater
ecological
energy
environment
feature
fumarole
geological
geology
geothermal
ground
gunnuhver
heat
hole
hot
iceland
icelandic
landmark
landscape
layer
mud
natural
nature
peninsula
power
renewable
resource
reykjanes
rock
rough
rugged
scenic
small
source
spring
steam
sulfur
sulfuric
terrain
travel
vapor
vent
volcanic
water