chalk distance distant England english farm forest Great Britain green hill landscape natural nature South Downs steep summer Sussex track trail trees view field flowers grass panorama peace plants quality village wild autumn bridleway fence meadow path post rural access barrier boundary clouds countryside entrance exercise gate hillside sky stile walk wooden empty pastoral ridge tranquil fields hills meadows spring crop wheat architecture barn buildings corrugated iron outhouse roof roofs coombe Devil's Dyke dry valley animal Chordata domestic domesticated flock livestock mammal ovis pasture peaceful sheep beautiful beauty blue