The idea of linking London and New York with an underwater tunnel has fascinated engineers and sci-fi fans for years. Spanning over 3,000 miles, the proposed tunnel would be one of the boldest engineering efforts in history—far beyond anything yet attempted.
Still, the concept has never moved past the drawing board. High costs, tough technical problems, and serious doubts about usefulness have kept it grounded. But fresh developments in vacuum tube and hyperloop systems have brought the vision back into the spotlight.
Right now, it takes about eight hours to fly between the two cities. Traditional trains, especially those running under the ocean, can’t match the speed or cost-effectiveness needed to justify such a tunnel. However,…
