Kvalsund Tunnel
The Kvalsund Tunnel (Norwegian: ) is a road tunnel that connects two islands in Tromsø Municipality, Norway. It links Kvaløya and Ringvassøya through the Kvalsundet strait, between the towns of Sørhelltaren and Nordhella. The tunnel is  long and was built in 1988 to replace a ferry that used to operate between the islands. The tunnel is located  below sea level.