Great Britain is a country which lies in the west of Europe.The full name of Britain is called The United Kingdom of Great Britain and Northern Ireland.Its capital city is London,which is on the River Thames.London is a beautiful city with a lot of old buildings.The tower Bridge is the landmark of London,which attracts many tourists each day.The No.10 Downing street is the prime minister's residence.The Buckingham Palace is the queen's residence,where there will be many tourists to watch the changing guard ceremony every other day.There are a lot of famous churches in London ,such as Wesminster and St Paul.In a word,London is a nice place you should never miss when you pay a visit to Britian.