destination distance distant England footpath grass Great Britain green hill landscape natural nature path plain ridge route spring track uk united kingdom view walk wiltshire boulder coast coastline island islands isthmus land Maddalena mediterranean pink rock rocky rough rugged Sardinia sea shore shoreline spit canada craggy far height high jasper mountain panorama peak range river Rockies Rocky Mountains summit valley countryside direction english field rural sky slope South Downs space summer Sussex travel atlantic blue cliff danger dangerous dizzy dizzying drop edge fall madeira ocean sheer vertigo water animal farm graze grazing horse mammal snow white winter beach blackpool channel dawn light line low pattern rill sand texture tidal tide