London is the capital and most populous city of England and the United Kingdom. It is a multicultural city with 8,674 million people. London is one of the world’s most important cities for business, finance, and politics.
The London Underground is a system of eletric tranis which are in London, United Kingdom. It is the oldest underground railway in the world. It started running in 1863 as the Metropolitan Railway. After the opening the system was copied in many other cities, for example New York and Madrid.