英文關鍵字
adventure
adversity
animation
avakas
black
boulder
canyon
caution
cliff
clod
danger
dangerous
deep
disaster
discovery
element
eroded
fall
fieldstone
geology
gorge
icon
illustration
land
landscape
layer
line
lump
motion
mountain
natural
nature
notch
obstruction
outline
park
pass
range
ravine
ridge
risk
road
rock
rockfall
sign
stone
symbol
thin
traffic
travel
tumble