closeup

large

bubbles

churned

boils

smooth

stone

water

verzaska

mountain

river

underwater

nature

untouched

wilderness

transparent

under

rock

seaweed

green

pure

waters

flowing

fast

view

switzerland

create

incredible

patterns

sharp

tool

rough

whetstone

carbide

cut

grindstone

domestic

preparation

grind

beach

snakestone

clear

dull

grey

abrasive

ecotourism

environmentally

friendly

ecologically

safe