Wales is a country that is part of the United Kingdom and whose physical geography is characterised by a varied coastline and a largely upland interior. It is bordered by England to its east, the Irish Sea to its north and west, and the Bristol Channel to its south. It has a total area of and is about from north to south and at least wide. It has a number of offshore islands, by far the largest of which is Anglesey. The mainland coastline, including Anglesey, is about in length. As of 2014, Wales had a population of about 3,092,000; Cardiff is the capital and largest city and is situated in the urbanised area of South East Wales.