Two afternoon walks to explore quarries in the Derwent Valley area. Bole Hill Quarry provided most of the stone for the Howden and Derwent Reservoirs via an inclined plane down to the Hope Valley Line. More information on Bole Hill Quarry can be found here.
Near "Surprise View" on the A6187 there was a quarry that produced mill stones; many were simply abandoned in situ.