> 300 km/h trains connecting Finnland with Spain with no delay or bumps?
Bit tricky this: either you cross the Baltic by ferry and resume at Tallinn, or you have to go a long way round north from Helsinki and come down again through Sweden, across Oresund and through Denmark.
That bridge is going to be incredibly easy to destroy, should a big enough country wish that. And it definitely isn't going to be rebuilt quickly enough to matter for a war.
Yeah, I meant the northern way, but a tunnel into the baltics, or a normal, peaceful landconnection over St.Petersburg would of course make more sense for connecting Helsinki. Or connecting Helsinki with Stockholm via Åland.
