英文關鍵字
attraction
canada
cascade
clouds
dawn
depth
early
edge
engulf
falls
famous
flow
flowing
foam
force
froth
horseshoe
landmark
landscape
lather
might
mist
morning
natural
nature
niagara
nobody
outdoors
pink
power
rapids
river
scenic
sky
spray
stream
strength
structure
sunrise
thundering
twilight
vigor
water
waterfall
wonder