A terminus or terminal is a station at the end of a railway line. Trains arriving there have to end their journeys (terminate) or reverse out of the station.
Travelling to and from LondonIf you are travelling to or from London, your ticket will usually show London Terminals rather than a specific station. This is because your ticket may be valid at more than 1 London Terminal station, as long as it is on a reasonable route, using National Rail services.
Because the first railway lines were all built by separate private companies, that each needed their own London Terminus for their own network. So you get St Pancras smack next door to Kings Cross, those next door neighbors served different company networks.
In rail transport, track gauge (in American English, alternatively track gage) is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible with the track gauge.
Grand Central Terminal is spread over 49 acres, has 44 platforms and 67 tracks on two levels. It is the world's largest train station by number of platforms and area occupied.