The Holder Stones is an impressively weathered and distinctive outcrop of gritstone on Blake Moor, one of the more unspoiled upland moorland tracts in the upper Calder valley area. They feature a range of engraved inscriptions dating back many years, including a memorial to the infamous leader of the Cragg Vale Coiner gang, 'King David' Hartley. This was added by his family after he was hanged in 1770 at York Castle for his crimes.