America aquamarine blue boulder clean clear cold fast flow natural nature pool pure river rock transparent water conifer forest tree calm clouds dordogne France french languid peaceful reflections roof sky tiles tranquil trees view village adelaide angles Australia background bank bridge cool culture grass grassed-area landscape lawns leisure light lighting lights outdoors park path pedestrians public-park recreation recreational-area reflection relaxing river-views riverside serene serenity sunlight sunshine walking walkway water-resources watercourse waterways boat capital city cloud dark dusk England english Great Britain London ripples sunset thames autumn bend fields green hill Kinnoul meander orange Perth perthshire scotland Tay viewpoint