across bridge bus coach comfortable empty flowering flowers hi-tech high modern movement moving multi-lingual no-passengers on-board-tour-commentary plants railing seating seats silhouette Singapore tourism tourists transport transportation travel traveling travelling black circle communicating communication denied directing direction directional directive informing no right turn not allowed not permitted parking permission denied prohibited prohibition red reflective road sign sign street sign traffic traffic flow verge warning white appropriate behavior appropriate behaviour care chinese danger dangers english no diving rain rain-drops risk risks signs swimmers swimming water wet beautiful beauty in nature black background bouquet bright close-up Color Image dry environmental conservation flower green indoors isolated leaf macro nature no people orange purple spring still life tulip vase vertical Vibrant Color yellow backgrounds blue branch burning candle candlelight celebration christmas christmas decoration december decoration fire flame glowing heat holiday illuminated night pine cone pine tree Retro Revival season winter alert appreciated appropriate-behavior appropriate-behaviour area black-&-white cigarettes environment gray grey greyscale health health-risk no-smoking not-allowed not-permitted permission-denied pollution thanks unhealthy apple blossom apple tree blossom bokeh. bud copy space flower bed fruit growth horizontal image outdoors photography plant sky spring blossom sunlight tree