Grassed-over mounds that lie to the west of the quarry, south of Pant-y-groes (SJ 1840 7265) and to the south of the Pentre Halkyn to Babell Road. Shafts are visible in a long line running north to south, originating from the road and extending along the public footpath towards Pwll-melyn.
The Maenbras Mine, and later the Prince Patrick West, operated in the area west of Prince Patrick Mine, now the site of the Pant-y-pwll Quarry.