Anglesey the island. The highest six are Holyhead Mountain, ; Mynydd Bodafon, ; Mynydd Llaneilian, ; Mynydd y Garn, ; Bwrdd Arthur, ; and Mynydd Llwydiarth, . To the south and south-east the island is separated from the Welsh mainland by the Menai Strait, which at its narrowest point is about wide. In all other directions the island is surrounded by the Irish Sea. It is the 51st largest island in Europe, and just five square kilometres smaller than Singapore. There are several small towns scattered around the island, making it quite evenly populated. The largest are Holyhead, Llangefni, Benllech, Menai
Admiralty Arch, Holyhead the eastern side of Anglesey. Due to its history it is known alternatively as the George IV Arch by the Royal Commission on the Ancient and Historical Monuments of Wales or the Triumphal Arch. The Grade II listed arch is situated within the Port of Holyhead on Ynys Halen and cannot be accessed by the public due to safety reasons. In 2017, plans to move it to a more open location were mooted. At present the best place from which to view it is from St Cybi's Churchyard. Admiralty Arch, Holyhead Admiralty Arch, located in Holyhead, Anglesey, was built in