blue coast coastal coastline flowers home house Lofoten Islands natural nature norway norwegian ocean rocks sea shore summer Umbelliferae umbellifers water wild Alpine Bistort arctic Bistorta vivipara green meadow Persicaria Polygonum Rhinanthus minor white yellow yellow rattle beach boulders footprints holiday horizon sand tide vacation wave birds breakwater groyne mountain seagulls seaweed view Camp cloud misty mountains sky tent algae bladderwrack boulder low tide plants rockpools low plant pool rockpool