The longest land tunnel in the world , the Lötschberg Base Tunnel , is in operation since late NUMBER@1 , connecting by rail the town of LOCATION@1 in canton LOCATION@2 , with the town of Visp in canton Valais/Wallis .

The longest land tunnel in the world , the Lötschberg Base Tunnel , will soon be working , in late NUMBER@1 perhaps , connecting by rail the town of LOCATION@1 in canton LOCATION@2 , with the town of Visp in canton Valais/Wallis .
