Gotthard tunnel, world's longest, opens in Switzerland | CNN
Gotthard Tunnel: dancing haystacks not whirling dervishes - SWI swissinfo.ch
Swiss open world's longest rail tunnel
تويتر \ Dark Horse News على تويتر: "Bizarre Opening Ceremony For Gotthard Base Tunnel In Switzerland PART 2 https://t.co/DTaN7OjxbX https://t.co/YQORxfFFnx"
Gotthard Base Tunnel | Description, Length, Importance, Opening, & Facts | Britannica
Bizarre Opening Ceremony For Gotthard Base Tunnel In Switzerland
Opening Ceremony of Worlds Longest Tunnel (Gotthard/Switzerland) - YouTube
Watch the Absolutely Insane Performance That Marked the Opening of the World's Longest Rail Tunnel – Foreign Policy
High-profile guests at the opening ceremony | Alptransit Portal