blue cliff coastline Cornish cornwall curved danger England english exercise fence fencing footpath Great Britain ocean path protect rocks safety sea tide trail Trek walk water waves wooden Armeria bay clifftop flowers hard headland hillside inlet natural nature plants shore surf thrift view Bedruthan Steps boulders cliffs countryside gorse track walking black coast crash dangerous foam landscape lava madeira rage roar rock rocky seethe shoreline sky swell swish turmoil wave bird gull herring gull island Pembrokeshire pink seagull Skomer spring summer united kingdom wales welsh wild bluebells bulbs campion Hyacinthoides admire calm company couple Gower hike hiker peace together trekker two uk walker access accessibility appropriate-behavior appropriate-behaviour be-careful beach beach-side bitumen care careful costal cycling cyclists families lookout movement moving observant pathway pedestrians people protective risks sand sandy sealed share sharing surface surfaces surfacing texture textured textures travel traveling travelling walkers