bank beach coastline Great Britain island landmark landscape lighthouse low natural nature rock sea shore Swansea terrain The Mumbles tide tourism tourists wales water welsh blue gray grey hills homes houses Lofoten Islands mountains northern norway norwegian ocean peaks remote rocky rugged settlement town village adventure alone coast Hawaii honeymoon paradise pool pools rocks single snorkel snorkeling summer swim swimming trip tropic tropical tropics vacation warm algae chalk cliff England erode erosion face green kent rockpool seaweed sky stone bushes cliffs Cornish cornwall english flowers gorse hillside inlet spring Ulex view wild yellow Birling Gap boulders cream eroded evening remnants Sussex white