London is the capital of the United Kingdom, its economic, political and cultural center. It is one of the world's most important ports and one of the largest cities in the world. London with its suburbs has a population of about 11 million people.London has been a capital for nearly a thousand years. Many of its ancient buildings still stand. The most famous of them are the Tower of London, Westminster Abbey and St. Paul's Cathedral. Most visitors also want to see the Houses of Parliament and the many magnificent museums.Once London was a small Roman town of the north bank of the Thames. Slowly it grew into one of the world's major cities.Different areas of London seem like different cities. The West End is a rich man's world of shops, offices and theatres.