autumn colourful contrast difference environment establish ghastly growing growth inhospitable leaf leaves mountain mountains nature penetrate rock rocks tree young color colour 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 yellow amber branch maple natural naturalised tawny beech bend british copper Fagus gold russet Sussex uk wood branches brown oak orange patchwork Quercus rusty texture bridleway footpath shadow sunlight track trail trunk