blue cloud dwindle edge high icy July landscape margin melt mountains natural nature norway norwegian plants plateau pool retreat road rock sky snow thick water white cold cover deep far freezing remote ridge snowy summer Thaw wild bank brassicaceae coastal Crambe maritima Cruciferae Cuckmere Haven ecology England english gravel Great Britain habitat halophyte halophytic plant sea kale shingle stones Sussex concrete evening fields geodetic hills landmark location marker meadows pillar point South Downs station survey triangulation trig viewpoint abandoned Cornish cornwall desuetude distorted disused gnarled heap mosses mossy old overgrown pile quarry rocks spoil stone stunted trees twisted isolated route transport