in Bizarre/Oddities, General Knowledge The Longest Tunnel in the World is 57… by Web Desk December 14, 2016, 12:14 pm 65 Views The Longest Tunnel in the World is 57 km long and goes from Switzerland to Italy underneath Alps. It took 17 Years to Build. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *