Eiksund Tunnel
The 145th longest tunnel in the world
The Eiksund tunnel (Eiksundtunnelen) is an undersea tunnel in Møre og Romsdal county, Norway, which runs under the Vartdalsfjorden connecting the municipalities of Ørsta and Ulstein. The tunnel is 7,765 metres (25, 476 ft) long and reaches a depth of 287 metres (942 ft) below sea level, and was the deepest undersea tunnel in the world until Norway's Rogaland county opened its 292 m (958 ft) deep Ryfast tunnel system in December 2019.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).