abandoned Cornish cornwall desuetude distorted disused England english gnarled Great Britain heap mosses mossy natural nature old overgrown pile quarry rocks spoil stone stunted trees twisted access ancient arch architecture Cotehele courtyard doors entrance historic historical home house manor mansion national trust spring window castle chimneys elements fortress Michael mount parapet saint St. Michael's Mount stacks stronghold beach clouds coastline fun holiday leisure mainland Marazion ocean people pleasure sand sea shore sky tourism tourists vacation walk water bay blue cliff cove green inlet landscape tide view waves barrier clifftop danger fencepost headland post protect coastal pools rockpools boulders cliffs dog exercise stroll walker