Chapel Porth Beach, Cornwall, England. Set in a mining valley between high cliffs, the first view of the cove is quite dramatic. The impression you will get of Chapel Porth depends on when and at what tide you go there. At high tide the beach can become a somewhat cramped, stone and shingle beach. However if you were to visit on a low tide it is quite different with the sands stretching all the way from St Agnes Head to Lushingtons at the far end of Porthtowan Beach.