The United States is a country located primarily in North America, consisting of 50 states and a federal district. It is known for its diverse culture, economy, and geography, ranging from mountains to plains. The capital city is Washington, D.C., and the country is recognized for its significant influence in global politics, technology, and entertainment. The United Kingdom is a sovereign nation made up of four countries: England, Scotland, Wales, and Northern Ireland. It is located off the northwestern coast of mainland Europe. The capital city is London, which is a major financial and cultural center. The UK has a rich history and is known for its contributions to literature, science, and democracy.