Channel Tunnel: Construction of the World's Longest Underwater Tunnel - The Constructor

Tunnels and underground excavations, History, Methods, Uses, & Facts

Channel Tunnel: Construction of the World's Longest Underwater Tunnel - The Constructor

As the Channel tunnel was excavated from the English coast, it intersected the Beaumont tunnel, built 100 years previously Stock Photo - Alamy

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Channel Tunnel: Construction of the World's Longest Underwater Tunnel - The Constructor

How World's Longest Undersea Channel Tunnel Was Built Between England and France

How the Channel Tunnel Was Built and Designed

Channel Tunnel: Construction of the World's Longest Underwater Tunnel - The Constructor

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