beach cliffs coastline Cornish cornwall cove England english Great Britain inlet natural nature ocean rocks sand sandy sea sheltered shore spring tide water waves wild ascend ascent climb climbing descend descent distance downhill farm farmland grass hill landscape livestock narrow road rural sheep steep straight tarmac track uphill view viewpoint cliff current flow mouth reach river surf yellow ancient architecture blue coast coruna Coruña eu galicia Hercules heritage house light lighthouse old peninsula roman romanic sky Spain structure tower World years