The ‘Chunnel’ may be the UK’s most famous underwater tunnel,

BBC Future

“Maybe 200 years ago, the channel looked as big a challenge to Napoleon’s engineers as crossing the Atlantic does today.”

The Channel Tunnel that was never built

The ‘Chunnel’ may be the UK’s most famous underwater tunnel, but the British have been trying to dig to Europe since 1880 – and plans still remain for a second Channel Tunnel.

BBC.COM