The Tunnel between France and England, an ongoing project for ages, written up in this long story: https://publicdomainreview.org/essay/the-early-history-of-the-channel-tunnel/
#ChannelTunnel #TunnelSousLaManche
Liberal Visions and Boring Machines: The Early History of the Channel Tunnel

More than a century before the Eurostar and LeShuttle, a group of engineers and statesmen dreamed (and fretted) about connecting Britain to France with an underwater tunnel. Peter Keeling drills into the history of this submarine link, and finds a still-relevant story about the cosmopolitan hopes and isolationist panic surrounding liberal internationalism.

The Public Domain Review