Wales is a country that is part of the United Kingdom. It is bordered by England to the east, the Severn Estuary to the south-east, the Bristol Channel to the south-west and the Irish Sea to the west and north. It had an estimated population of 3,170,000 in 2020 and has a total area of 20,779 km
2 (8,023 sq mi). Wales has over 1,680 miles (2,700 km) of coastline and is largely mountainous with its higher peaks in the north and central areas, including Snowdon, its highest summit. The country lies within the north temperate zone and has a changeable, maritime climate. The capital and largest city is Cardiff.