autumn background backlit Castanea chestnut color colour England english fall golden Great Britain leaf leaves London park sunlight sweet tawny texture trees yellow beautiful beauty lake leisure national trust nature pleasure Sheffield Park Sussex tourists water blue sky brown cloud clouds colors colours forest green horizon orange red sky tree wood woods amber exercise footpath outdoors parkland path Surrey trail walk afternoon sky Autumn sky blue formations gray grey late afternoon layers levels skies skyshow variations weather indicators white beech copper Fagus natural russet rusty woodland Hippocastanea horse chestnut shadow trunk deciduous lime linden Tilia bush climber farm orchard plant shrub vine vineyard bracken larch Larix light