background pattern pebble pond rock stone stream texture underwater water dead fish flies fly grass insect polluted pollution rot Asia buildings cities city coastline Hong Kong mountains skyscrapers blue cloudy fishing lake landscape lilly mirror nature sky aqua bubbles clean cool drink drop energy flush fountain fresh life liquid motion refreshed river Romania sparkle splash spray spring spring well sprinkle summer warm water jet waterfall wet building gulf lamp park path sidewalk town tree bank banks canal channel fall falls lawns shore stones waterfalls yard advice alert announcement appropriate-behavior appropriate-behaviour avoid be-careful beware black care caution communicating communication concern danger dangerous deep denied directions health information informing not-allowed not-permitted permission-denied prohibited prohibition protect protection red risk risks risky rules safety sign signs toxic toxicity unhealthy warning warning-sign water-pollution water-toxicity weathered white anchorage anchored at-anchor boat boat-pens boats dark dark-skies dark-water distance distant expanse-of-water harbor harbour marina mast masts moored moorings navigation outdoor outdoor-sports outdoors outside pastime recreation sail sail-boats sailing sailors sea security skyline stormy stormy-skies tied-up transportation travel trimaran views waves wealth weather winter wintry yachts