A Helsinki-Tallinn tunnel
This one has been talked about for years - some background here for example. But with question marks over the completion of Rail Baltica to Tallinn by 2030 I am not holding my breath for this one!
This one has been talked about for years - some background here for example. But with question marks over the completion of Rail Baltica to Tallinn by 2030 I am not holding my breath for this one!