boiler house remains at the post-medieval industrial brickworks at porthwen, anglesey, north wales

amlwch anglesey aonb area beam beauty boiler bolier brick bricks brickworks britain cylinder cylindrical derelict drums gem gwynedd hidden history house industrial isle kingdom llanbadrig monument natural north now outstanding overgrown porth porthwen postmedieval remains rust rusting rusty scheduled social united unkept unused victorian view wales welsh wen