China wants to build a high-speed railway that would link Beijing to Vancouver.
The route would stretch a staggering 13,000 kilometres, spanning across Siberia and reaching Alaska through a 200-kilometre underwater tunnel at the narrowest point between Russia and the US. Vancouver would be just one stop along the rail; the route would end in the eastern US, according to the Beijing Times.
According to China—which says it would fund the project itself but acknowledges "the details of this project are yet to be finalized"—the train would run at up to 350 kilometres per hour, thus completing a one-way trip in roughly fewer than 40 hours.
The cost of this project is estimated to be as high as $2 trillion. Actually building it may never happen, but if it does, it won't be for many, many years.