A groundbreaking proposal for a tunnel linking New York and London beneath the Atlantic Ocean is back on the table, with a projected cost of nearly $20 trillion. The ambitious project, known as the Transatlantic Tunnel, aims to reduce the 3,000-mile journey between the two cities to just under an hour, thanks to advancements in vacuum tube technology and pressurized high-speed trains, commonly referred to as a “hyperloop.” This tunnel could revolutionize travel by offering an environmentally friendly and faster alternative to air travel, though its enormous cost and lengthy construction timeline remain significant challenges.

Proposals for the tunnel have fluctuated in design, ranging from an underwater structure to floating platforms, but all face hurdles due to the immense scale of the project. Despite these obstacles, the project has gained new momentum as vacuum technology, which eliminates air resistance, has advanced, enabling trains to reach speeds of over 3,000 mph. If realized, the tunnel would drastically transform global travel, though no final design or timeline has been established yet.