access coastline Cornish cornwall England english entrance footpath gate Great Britain nature path sea view water wood architecture bridge landmark pillar railway river stone train transport viaduct green homes houses landscape meadow wall cliff hard natural ocean rock shore tide waves coastal pool rockpool rocks rocky worn cowslip flowers petals Primula veris Primulaceae spring wild yellow coast home Marazion seaside town blue clifftop background cracked geology lines pink purple sedimentary texture