bridleway chalk destination direction distance distant down downhill England english farm fence field footpath forest goal grass Great Britain green hill landscape meadow path post South Downs Sussex track trail travel Trek view walk Brecon Beacons changeable cloud fey fickle hills lake moor mountains natural nature panorama road route rural shadow sky stormy sunlight united kingdom wales welsh animal countryside equestrian grassland horse mammal peace ride rider ridge slope summer tranquil bush domesticated livestock rest sheep shelter shrub tree danger exercise hedgerow passing rain storm walking abundance abundant clover diverse diversity ecology flora flowers habitat profusion rich umbellifer verdant wild crop peaceful plain quality village woodland graze lamb national park spring blue clouds Devil's Dyke steep trees yellow