Scotland is one of four countries that make up the United Kingdom. It has a population of around 5 million people and three official languages: English, Gaelic, and Scots. Edinburgh is the capital city, known for its annual Fringe Festival featuring many comedy shows and street performances. Glasgow is Scotland's largest city, located on the west coast along the River Clyde. The Highlands in northern Scotland contain many mountain ranges and lochs, or lakes, including Loch Ness, famous for the legendary monster Nessie.