biome bridleway countryside England english footpath forest Great Britain green landscape Leith Hill natural environment Natural landscape nature reserve ride Surrey track trail trees vegetation woodland exercise explore footbridge nature path public right of way spring stile Sussex Bedfordshire dog enjoyment field fun hill leisure man meadow pleasure slope stroll sunday view walk woman animals cloud domesticated farm graze lambs mammals pastoral peace sheep sky South Downs valley fence activity healthy journey people ramble rural travel tree Trek autumn color colour fall leaves light natural shade shaded shadows shafts sunlight trunks animal canada carry cliff conifers horse mammal mountain pack pack-horse peak rock Rockies Rocky Mountains saddle snow summit transport chalk flora flowers hills summer umbellifers verge white wild bare beech branches deciduous Fagus January plant trunk winter bleak boulder destination direction hard high hike montane mountains range rocky stone terrain