Channel Tunnel

The Channel Tunnel is a 50.46-kilometre undersea railway tunnel connecting Folkestone, England to Coquelles, France, opened in 1994, with the longest underwater section of any tunnel in the world and the third-longest railway tunnel globally. The tunnel carries high-speed Eurostar passenger trains, LeShuttle services, and freight trains, and is owned and operated by Getlink. It has a top speed of 160 kilometres per hour and connects end-to-end with high-speed railway lines in France and England. The tunnel has experienced occasional mechanical problems, and aggregations of migrants have prompted deterrence and countermeasures since at least 1997.learn more on wikipedia