Scotland is a country in north-western Europe and still one of the constituent nations of the United Kingdom. It has a 60 mile (96 km) land border with England to the south, and is separated from Northern Ireland by the North Channel of the Irish Sea. It is surrounded by the bracing waters of the North Sea to the east, and the North Atlantic Ocean to the west and north. There are over 700 islands, most in groups to the west (the Inner Hebrides and Outer Hebrides) and north (Orkney Islands and Shetland Islands). The capital is Edinburghand the largest city is Glasgow.