London is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium.

London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport all contributing to its prominence. Together with New York City, London is the world's leading financial centre. London is known for its cultural diversity. More than 300 languages are spoken in London. In March 2011, London had an official population of 8,174,100, making it the most populous municipality in the European Union, and accounting for 12.5% of the UK population

London contains four World Heritage Sites:

  1. The Tower of London:
    First built by William the Conqueror in 1078 as a palace and royal residence. It lies on the bank of the River Thames.
  2. Kew Gardens:
    The world’s largest collection of living plants.
  3. The site comprising the Palace of Westminster, Westminster Abbey, and St Margaret's Church:
    Historic buildings showcase the growth of the English monarchy.
  4. The historic settlement of Greenwich
    In which the Royal Observatory marks the Prime Meridian, 0° longitude, and GMT).

Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge and Trafalgar Square. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions, including the British Museum, National Gallery, Tate Modern, British Library, Wimbledon, and 40 West End theatres. The London Underground is the oldest underground railway network in the world

Source: Wikipedia

Here is a list of more pages about the United Kingdom: