near blaenau ffestiniog, gwynedd. llyn cwmorthin with the ruin of cwmorthin terrace, the compressor house and the quarry in the

cwmorthin mountain gwynedd snowdonia slate sky north wales tourism quarry panorama blaenau ffestiniog britain nature outdoors travel lake rock stone tree industry outdoor moelwynion welsh countryside moody ruin abandoned industrial tanygrisiau water history grass clouds great wall derelict heritage landscape united kingdom cloudscape structure mountains architecture old building house gwynedd llyn terrace compressor background