英文關鍵字
underwater
steep
rapids
power
water
pure
river
stone
verzaska
nature
ecotourism
background
beautiful
landscapes
canyon
carves
wears
away
closeup
large
smooth
mountain
untouched
transparent
under
rock
seaweed
green
flowing
fast
switzerland
create
patterns
sharp
rough
whetstone
cut
grindstone
grind
beach
snakestone
clear
dull
environmentally
friendly
ecologically
safe
boils
bubbles