London is the capital city of England and the United Kingdom, with a history dating back two millennia. It is a global financial and cultural center, and home to many iconic landmarks like Big Ben, Buckingham Palace, Tower Bridge, and Trafalgar Square. The document provides details on these and other major sites in London, including the Houses of Parliament, London Eye, Tower of London, and various parks, museums, and neighborhoods that make up Britain's historically rich and vibrant capital city.