Llwyngwern Quarry
Q156150, United Kingdom · built 1828
The Llwyngwern quarry (sometimes known as Glandulas quarry or Maglona quarry) was a slate quarry in Wales that opened by 1828 and continued working until about 1950. The quarry is located on the western flank of Mynydd Llwyn-gwern.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).