The tunnel beneath the English Channel carrying Eurostar trains is the Channel Tunnel.
The Channel Tunnel links Folkestone in Kent with Coquelles near Calais in northern France. It opened in 1994 after construction by British and French teams using large tunnel-boring machines. The system consists of two rail tunnels and a central service tunnel, running for about 50.5 kilometres beneath the seabed and land approaches.
Eurostar passenger trains use the tunnel for services between London and cities such as Paris, Brussels, and Amsterdam. The tunnel also carries vehicle shuttle trains operated by LeShuttle, formerly called Eurotunnel Le Shuttle. It is therefore more than a passenger railway: it is a major fixed link for both people and vehicles.
The Channel Tunnel is often called the Chunnel in English, but “Channel Tunnel” is its standard formal name. About 37.9 kilometres of the route lies beneath the sea.