ancient arch architecture bank bridge Cadover Bridge Devon England english flow Great Britain nature old Plym reflection river rural stone summer water beach cloud coastline gravel groyne kent light reflections sea shingle shore sky St Margaret's Bay storm view bridleway calm canal February footpath path peaceful still sunny Sussex towpath tranquil trees winter banks Bedfordshire course fresh great green natural Ouse oxygenate oxygenation waterweed weir autumn color colour copper dusk gold orange pond pool brick countryside little quiet small spring tiny atlantic blue cliff distant edge far horizon huge madeira ocean panorama plant vast vegetation barn duckweed landscape lily Michelham moat pad plants priory protection reed waterlily restful turning