Skansen Tunnel
The 492nd longest tunnel in the world
The Skansen Tunnel (Skansentunnelen) is an immersed tube underwater tunnel in the city of Trondheim in Sør-Trøndelag county, Norway. Part of Norwegian National Road 706, it runs from Brattøra to Ila. The tunnel is 510 meters (1, 670 ft) long and opened on 27 May 2010.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).