Did you know what a busy place Hay was in bygone days? As we walk up Cusop Dingle, you’ll learn how water powered corn mills, a paper mill and early hydroelectricity. It’s not just about industry, though, for as well as a brick kiln and a tram road, Cusop Dingle was also home to the poisoner Herbert Armstrong, the only English solicitor ever hanged for murder. We’ll cover geology, landscape, industrial archeology and history. Walking boots and all-weather clothing required. Bring a packed lunch. Distance 7 miles. Ascent 200 metres.