Christopher Christophi and Lucas Mazarrasa came up with this surprising concept for the eVolo skyscraper competition: The Hyper-Speed Vertical Train Hub. I don’t really know how it would work — I’m guessing superconductors and magic — but I’d love to see it built, with all those maglev trains coming up and down the tower and in and out the tunnels under the megalopolis.
Here’s their description: