What are your craziest transportation ideas and dreams?

there was this idea for a swiss wide hyperloop like metro: https://swissmetro-ng.org/en/

and more recent one a similar system just for cargo: https://www.cst.ch/en/

Both have enormous potential but ofc also enormous costs. More realistically I would be really happy if we would have a European wide high speed railway. Similar like the Shinkansen, connecting all major cities.