afternoon sky autumn Autumn sky blue clouds colors colours fall formations gray grey late afternoon layers levels skies sky skyshow variations weather indicators white amber beautiful beauty beech color colour copper England english Fagus Great Britain natural nature orange russet rusty sunlight Sussex tree trees woodland Betula birch bracken conifer countryside footpath heathy landscape Pinus scots pine Surrey track trail walk heather exercise lake leaves outdoors parkland path water yellow brown golden Hippocastanea horse chestnut London park shadow tawny trunk aerate aeration architecture background buttresses cascade cascading dam danger drop Elan Valley hold landmark old reservoir retain stone texture wales wall welsh abstract agriculture dry dry grass field flower flowers fresh garden grassland growth lawn outdoor plant plants summer tile twig yard deciduous lime linden Tilia bush climber farm leaf orchard red shrub vine vineyard floor forest gold litter shadows winter