Keywords: Why London Underground is nicknamed The Tube.jpg The nickname Tube comes from the almost circular tube-like tunnels through which the small profile trains travel This photograph shows a southbound Northern Line train travelling to Kennington via Charing Cross leaving a tunnel mouth just north of Hendon Central station Il soprannome Tubo si deve alle gallerie circolari simili a tubi dentro la quale ridotta sezione viaggiano i treni Questa fotografia mostra un treno della Northen Line diretto a sud uscire dalla imbocco della galleria poco a nord della stazione centrale di Hendon own SPSmiler London Underground 1995 Stock Why London Underground is nicknamed The Tube jpg Northern Line London Underground tunnels Round Rail tunnel portals Red rail vehicles |