Iceland (Icelandic: Ísland; [ˈistlant])[c] is a Nordic island country in the North Atlantic, with a population of 364,134 and an area of 103,000 km2 (40,000 sq mi), making it the most sparsely populated country in Europe.[d] The capital and largest city is Reykjavík. Reykjavik and the surrounding areas in the southwest of the country are home to over two-thirds of the population. Iceland is volcanically and geologically active. The interior consists of a plateau characterised by sand and lava fields, mountains, and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite a high latitude just outside the Arctic Circle. Its high latitude and marine influence keep summers chilly, with most of the archipelago having a polar climate.