autumn bridleway countryside England english exercise fall footpath forest Great Britain green lane leaves natural nature path rural shade shadows shady Sussex trail travel trees walk woodland cloud fields grass hills landscape lines meadows peaceful quiet sky striped stripes Surrey tranquil country field meadow peace South Downs summer view brown deciduous leaf leisure Natural landscape plant tree trunk winter wood Acer color colour maple shadow sunlight veins berries berry black bryony bush Dioscorea communis fruit hawthorn poisonous red ripening wild bank bird blue current flow gentle placid reflection river spring swan water branch edge margin moss northern pretty animal dog hillside labrador mammal North Downs track