agitated battle blue choppy coastline current Devon England english exe flow Great Britain natural nature river Sandbar sea turbulent water waves bluebells flowers green Hyacinthoides non-scriptum path spring Sussex track trail trees wild woodland background Birling Gap chalk cliff coast cracked cream evening flints rock stone texture white abundant Hyacinthoides non-scripta many profusion arch architecture brick city concert elements facade historical Kensington London ornamental ornate Royal Albert Hall Victorian Aesculus hippocastanum branch fresh horse chestnut leaf leaves life New Surrey tree twig amber autumn brown Castanea chestnut fall frost frosted tawny winter clouds flora landscape plants sky South Downs summer umbellifers umbels Cornish cornwall developing fern fronds garden growth pinnae plant pteridophyte stems temperate unrolling