A lead and silver mine worked between 1867 and 1886 exploiting ores within the Cefn-y-fedw sandstone overlying Carboniferous Limestone. .
The Eglwyseg Vein cuts east to west across the World’s End area of Ruabon Mountain. Disused workings lie to the west of the woods at Craig-y- Forwyn at SJ23604800, just off the Offa’s Dyke Path. To the south at World’s End, an old level cut in at SJ23454775; to the west of this a second level on the vein at SJ23004780 remains to the north of Graig-y-Adar. On the eastern extremity of the vein a large shaft remains at SJ24854750 also referred to as Eglwyseg Extension.
Area of disused mine shafts located to the east of the steep sided valley into Worlds End. The site consists of three shaft depressions of up to 20m diameter and 4.5m deep. These shafts are located to the north east of a large shaft with a large sub-circular earthfast spoilheap, approximately 30m in diameter and 2.5m high