Estimates suggest that building such a tunnel would cost an astronomical $19.8 trillion and stretch an impressive 3,400 miles across the Atlantic Ocean.
The Transatlantic Tunnel would be more than 100 times that length, raising the stakes significantly.
So how exactly would this marvel of engineering work?
This method would avoid many of the challenges of building under the ocean floor.
Thanks to advancements in vacuum technology, trains within the tunnel could reach speeds exceeding 3,000 mph, dramatically cutting down the travel time to under an hour.
This would completely transform how we think about international travel.
Although these ideas are fascinating, neither the US nor UK governments currently have concrete plans to fund or build the project.
Still, it’s a concept that continues to capture imaginations and spark debate about the future of transportation.
One major concern raised by skeptics is the potential cost of tickets for such a journey.
If built, this futuristic mode of travel might only be accessible to the ultra-wealthy due to the high expense of construction and maintenance.
A third added: “It would never pay for itself, because yearly maintenance costs would always be more than the amount it would save in air and sea transport—which isn’t as much as you might think, because many people would pay for air travel instead of spending several days crossing by train/automobile, and sea freight would remain cheaper.”