The Fairy Holes comprise a complex of gritstone caves near the summit of Alderman’s Hill to the north-west of Dovestone Reservoir. According to legend, a dog pursued a fox into the cavern one Whitsun morning long ago, and neither fox nor dog was ever seen again.
The Pots and Pans rock formation is nearby, but a little further from Greenfield. Pots and Pans sports a long, irregular hole, in which diseased persons could be put so that the spirit of the rock might cure them; compare this with the legend of the Bawdstone on Staffordshire Moorlands. There are also ‘basins’ cut into the rocks, either artificially or naturally, and the water that collects in those basis will cure sore eyes. This superstition could be ancient.
See Joseph Bradbury (1871) Saddleworth Sketches, republished 2010 by Kessinger Publishing. The book contains a chapter by a Mr A. Robinson, describing a descent into the Fairy Holes in or around 1825.