One of the few things that are making London such a great and unique city is the metro. London is well known for all the underground transporting systems such as the metro. The underground of the London even got a nickname the Tube because it is very large and covering the entire city. Wherever you find yourself in London, you can get to the opposite side of if in no time if you use the underground transport that they have. It is truly an efficient way of transport that everyone can use. The great thing about them is the speed of travel.