The first journey on the London Underground (or the Tube as we affectionately call it) was made 150 years ago, on 9 January 1863. Since then, the iconic transport system has become one with London itself.
Google has celebrated the occasion with a doodle.
![Tube Doodle](https://i0.wp.com/jrogel.com/wp-content/uploads/2013/01/Tube-Doodle.jpeg?resize=720%2C450)