amber background brown copyspace flow ripples river stones texture water against light black comic face monument ornament. pigeon wall pattern pebble pond rock stone stream underwater 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 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 grass lawns shore waterfalls yard advice alert announcement appropriate-behavior appropriate-behaviour avoid be-careful beware care caution communicating communication concern danger dangerous deep denied directions health information informing not-allowed not-permitted permission-denied polluted pollution prohibited prohibition protect protection red risk risks risky rules safety sign signs toxic toxicity unhealthy warning warning-sign water-pollution water-toxicity weathered white