beach canada coastline natural nature ocean pattern rill sand sea seawater shore streaming texture Vancouver Island water wave Cornish cornwall England english Great Britain low mussels Mytilus rock rocky tide view Armeria maritima coastal flowers pink purple rocks spring thrift wild countryside gorse habitat heath heather heathland ling Sussex Ulex yellow Israel kinneret lake Lake of Gennesaret Lake Tiberias Sea of Galilee bark Castanea chestnut cracked fissured old rough tree trunk Aesculus carnea Hampshire Hippocastanaceae horse chestnut petals red altitude autumn color colour foliage high leaf leaves montane mountain patchwork plant Rockies Rocky Mountains Fluvial landforms of streams forest Geological phenomenon landscape Natural landscape stream water resources watercourse waterfall waterway