Europe wants to take another step towards building new underground rail transport.
To this end, in 2028 is planned the inauguration of the Scandinavian-Mediterranean corridor, which will be the longest tunnel in the world and will connect the north with the south of the "Old Continent".
Work on this infrastructure began in 2008, although excavations began in 2015. The project has a budget of 8 billion euros.
As explained by the European Union, this corridor represents a crucial axis for the continent's economy, connecting a total of 6 countries.
The countries involved are Malta, where the tunnel will start in its capital, Valetta.
It will then pass through Italy, where the corridor will be connected to ports in the south of the country and industrial centers in the north.
Among the cities are Palermo, Naples, Bari, Naples, Rome, Bologna and Verona. From there, the next major link for this project will be Germany, with links to Fehmarn, Hamburg, Hanover, Bremen, Nuremberg and Munich.
The final destinations will be Denmark (Copenhagen), Sweden (Stockholm and Malmo) and Finland, with the tunnel ending in Helsinki.
Considered one of the priority axes of the trans-European transport network, it will become the largest underground railway network in Europe and in the world. It will be more than 4,000 kilometers long.
Today, the longest tunnel in the world is that of Gotard, located below the mountains of Switzerland, with a length of 57.04 kilometers.