The United Kingdom (UK) is a sovereign country located off the northwestern coast of mainland Europe. It comprises four constituent nations: England, Scotland, Wales, and Northern Ireland. With a rich history spanning centuries, the UK is known for its cultural heritage, including iconic landmarks such as Big Ben, Buckingham Palace, and Stonehenge. It has a parliamentary democracy with a constitutional monarchy, with London as its capital and largest city. The UK is renowned for its contributions to literature, music, science, and politics, and it plays a significant role in global affairs as a member of various international organizations.