AW and Eric climb Pen-y-ghent in Yorkshire's limestone country, discovering that its charms are as abundant below ground as above.

AW shows Eric Robson some of the delights still to be discovered above Haweswater. They enter the valley on the "Old Corpse Road" from Shap and survey its full extent at the summit of High Street. Wainwright recalls his first visit there more than 50 years ago to see Mardale before it was flooded and where now "there's nothing left but ghosts."

Twenty years after AW published his pictorial guide to The Pennine Way, he guides Eric Robson through perhaps the finest section beginning at Wynch Bridge in Teesdale and finishing 2,700 feet up in the Pennines.

AW introduces Eric Robson to this neglected group of Cumbrian hills just north of Sedbergh. In addition to viewing the spectacular waterfall at Cautley Spout, reliving the history of Fox's Pulpit and savouring the quiet beauty of Bowderdale, the pair begin their exploration on the western fringes of the Howgills.

In an emotional journey, AW returns with Eric Robson to the places that hold special memories—to Orrest Head ("an awakening beauty"), to Borrowdale ("the loveliest square mile in Lakeland") and to Haystacks ("the best fell top of all"), and recalls the making of his unique Guide to the Lakeland Fells.