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

Survey team waiting for works train with manrider coaches to transport them to another worksite on the Channel Tunnel project Stock Photo - Alamy

Building the World's Longest Undersea Railway - The Channel Tunnel Story

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

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

How Did They Build The Underwater Tunnel From England To France?, Super Structures

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

How the world's longest underwater tunnel was built - Alex Gendler

Fehmarnbelt Tunnel: The longest underwater rail and road tunnel in the world will connect Germany and Denmark

World's Longest Underwater Tunnel Being Built - Videos from The Weather Channel

Fehmarn Belt Link: Are the benefits of the world's longest underwater rail tunnel worth the damage?

Channel Tunnel surveyors used satellite positioning and computer-aligned lasers to ensure the undersea tunnels met in the middle Stock Photo - Alamy

Channel Tunnel, a Look at Who Built the Chunnel

Channel tunnel construction engineer hi-res stock photography and images - Alamy

Fehmarnbelt Tunnel: The longest underwater rail and road tunnel in the world will connect Germany and Denmark

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