cwmorthin and rhosydd slate quarry

cwmorthin rhosydd slate quarry graig ddu moelwyns moel hydd building disused disuse unused abandonded abandonment derelict mountains mountain mountainous quarrying mining industry waste tips spoil heaps industrial snowdonia national park gwynedd north wales view scene scenic scenery vista panorama landscape terrain hiking destination tourism popular adventure outside leisure hike active history historic historical old outstanding beauty moelwyn quarries cwmorthin distance arae hikers eryri ntional