altitude autumn canada color colour foliage high leaf leaves montane mountain natural nature patchwork plant Rockies Rocky Mountains tree yellow colourful contrast difference environment establish ghastly growing growth inhospitable mountains penetrate rock rocks young England english enjoy exercise fall Great Britain lake leisure London park path people pleasure pond trees walk Acer deciduous forest green shade Surrey sycamore trunks woodland amber branch maple naturalised tawny beech bend british copper Fagus gold russet Sussex uk wood bridleway footpath oak Quercus shadow sunlight track trail trunk