Håra Tunnel
The 495th longest tunnel in the world
The Håra Tunnel (Håratunnelen) is a road tunnel in Ullensvang Municipality in Vestland county, Norway. The 475-metre (1, 558 ft) long tunnel is in the village of Håra, located on the shore of the lake Røldalsvatnet. The tunnel is a spiral tunnel, turning almost a complete circle while continuously traversing a gradient of 7%. The tunnel was built to replace a narrow section of road that was made up of many hairpin turns.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).