英文關鍵字
waterfall
water
video
step
stair
stream
outdoor
flow
cascade
landscape
river
flowing
staircase
fall
nature
park
stone
tree
pond
scenery
splash
artificial
rock
tourism
wet
green
background
beautiful
environment
drop
stairway
attraction
bridge
concrete
fountain
scenic
construction
wall
natural
summer
travel
contrast
idyllic
structure
motion
calm
hiking
journey
outside