Just look Snowdonia on the map. Hiking... Capel Curig would be good...PM Pip Freeman and you will get some if not all of the ones like Moel Siabod, Carnedd Llewellyn, Carnedd Daffydd, Tryfan, Yr Wyddfa, etc... .. Elsewhere, Pip loved the Pembroke coast path...
(Gareth, remember you didn't even give the highest peak in Cymru any mention or give any N Wales place credit)
Jon