Map sheet number 263 in the OS Explorer series covers the east of the Isle of Anglesey, Bangor, Beaumaris, Amlwch, & Menai Bridge. Highlights of the area include: Caernarfon, Menai Straight, Cefni Reservoir, Anglesey AONB, Puffin Isl&, Irish Sea & Menai Strait coast. With this map you will receive a code for use on your i OS or Android smartphone or tablet. Find our more at Mobile Download FAQ. The OS Explorer map for Anglesey East is available in both the standard paper version & weatherproof ' Active' version.