Gunnerside Gill (or Ghyll) is a small valley in the Yorkshire Dales which branches off Swaledale into moorland to the north of Gunnerside. The site of intensive lead mining in the 18th and 19th centuries, the valley still contains much evidence of its industrial past. Streams were dammed, and the water released as a torrent to scour soil off the surface and reveal lead ore (galena) seams. The resultant scars are known as hushes (perhaps an onomatopoeia of the sound that the water made). Bunton, Friarfold, and Gorton hushes are on the east side of the valley, with the North Hush being on the opposite side. Large areas of the upper valley are covered in spoil heaps from the mining activity, and a number of buildings remain. Many of the buildings and mine structures are scheduled ancient monu