Wales i/ˈweɪlz/ (Welsh: Cymru; Welsh pronunciation: [ˈkəm.rɨ] ( listen)) is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It had a population in 2011 of 3,063,456, and has a total area of 20,779 km2 (8,023 sq mi). Wales has over 1,200 km (750 mi) of coastline, and is largely mountainous, with its highest peaks in the north and central areas, including Snowdon (Yr Wyddfa), its highest summit. The country lies within the north temperate zone, and has a changeable, maritime climate.