In reply to ewanjp:
It's a bit of a drive, but a lovely walk passing various rocky bits can be made by starting at Darley Bridge, near Matlock.
Through some woods up to Birchover (there may be daffodils out if you're lucky), have a wander around Rowtor (don't miss the rooms carved out of the rock), Over to Cratcliffe/ Robin Hoods Stride, towards Youlgreave and a change to Limestone at Rheinstor and then back over Stanton Moor with various rocky features from huge quarries to standing stones and if you can find it a short and sharp ridge hidden in the woods. That might be a bit on the long side, but it's worth it.