London is also one of the cities with the most developed metro line in the world. Thanks to the metro lines that cover almost the entire city, you can easily go anywhere you want to reach with these fast and comfortable vehicles. However, if it will be your first visit to the city, one of the best options is city tours that you can join by paying about 1.5 - 2 pounds. Thanks to these tours, where you can see many important points of the city, you can discover many of the historical places and structures.