Map No. 123, Lleyn Peninsula / Pen Llyn, in the waterproof & tear-resistant OS Active version of the Ordnance Survey Landranger series at 1:50, 000, including Pwllheli, Bontnewydd, Groeslon, Clynnog-fawr, Penygroes, Llithfaen, Nefyn, Garndolbenmaen, Rhoslan, Chwilog, Llanbedrog, Abersoch, Llanengan, Botwnnog, Rhiw, Aberdaron, Rhydlios, Llangwnnadl, Dinas, Boduan, Tudweiliog & Groesffordd, with the Bardsey Island/ Ynys Enlli & a small north-western part of the Snowdonia National Park/ Parc Cenedlaethol Erryri. Edition B3 with minor changes; Publication date April 2012 About Ordnance Survey