Offices of the Brenner Base Tunnel project in Franzensfeste, South Tyrol. When completed, this will be the longest train tunnel in the world, stretching 64 kilometers (40 miles) between Innsbruck and Franzensfeste. It is more than 580 meters (1900 feet) below the surface as it passes underneath the border of Austria and Italy at the Brenner Pass in the Tyrolean Alps. Photo taken in November, 2019. Click here for more info.