algae chalk cliff coast England erode erosion face Great Britain green kent landscape low natural nature rock rockpool sea seaweed shore sky stone tide water animal cow farm field follow lead leader livestock mammal meadow pastoral pasture South Downs summer Sussex three trio Anthyllis Armeria blue coastline Cornish cornwall english flora flowers headland kidney vetch pink spring thrift wild yellow alone bracken clouds heath heathland isolated lone oak one Quercus robur single tree environment health high hike hill Mallorca mountain mountains open outdoors pine ridge top tourism travel trees Trekking view wilderness countryside direction distance distant grass rural slope space track ah branches bridleway destination exercise footpath Fraxinus path Quercus trail walk winter boulder canada craggy far height jasper panorama peak range river Rockies Rocky Mountains rough summit valley