London Underground dates from 1863 and is popular by name The Underground or The Tube, because the cylindrical shape of the tunnels. It is the first metro in the world. One of its longest lines are Central line, Circle, Victoria and District line. The newest and fast line of the tube is Jubilee line. Now it has 260 stations.
The first “trains” it was powered by are steam locomotives. They were replaced by electric ones after 1890. The first segment of the tube is part of the current line Hammersmith and City Line (Hammersmith & City line). Despite its name, over 55% of the lines of the “underground railroad” are located above ground. Today the London subway consists of 275 stations and 408 km lines, making it the longest subway in the world, serving 3 million people daily.
Using the tube is not expensive. It costs anything from £1.00 to £3.60 for an adult, depending on the length of the journey. The underground is measured by zones, and the more zones you travel through, the more they’ll charge you. Child discount is available for those which are under 15, under five’s traveling with the underground is free.