We have voted for the London Tube and the Tube map! The Tube is the first true underground railway system in the world. It was opened in 1863 and now it is the largest one. The Tube has 274 stations and 270 million people use it every year. The Tube map is an absolutely new type of map. It does not show true distances, it only shows how to get from one place to another. The map, which Harry Beck created in 1931, is recognised as a model map. It has been around for many years and millions of people use it every day. grammar for revision The numerals 150 million people millions of people GS p. 193