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
Holy Island, Anglesey scientific interest – Beddmanarch–Cymyran. Holy Island is connected to Anglesey by two road links. The first, the Stanley Embankment, is made up of causeways carrying the A5/A55 and the main railway line to Chester and London, and the original bridge of the A5 post road. The second is Four Mile Bridge, which carries a 'B' road and is much smaller. The main settlement is the port of Holyhead, from which passenger ferries travel to Dublin Port, Ireland, and freight ferries also travel to Dublin. Holyhead railway station is located in the town. Other settlements include the villages of Trearddur Bay,