Great St Bernard Tunnel
The 188th longest tunnel in the world
The Great St Bernard Tunnel (Tunnel du Grand Saint-Bernard, Traforo del Gran San Bernardo, Grosser-Sankt-Bernhard-Tunnel) is a road tunnel complementing the Great St Bernard Pass, linking Martigny (in the Swiss canton of Valais) with Aosta (in the Aosta Valley, in north western Italy).
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).