Eröffnung des Ceneri-Tunnels: Die Schweiz wächst zusammen
Zimmerberg Base Tunnel - Wikipedia
Rockmore Supply Contracts Advance Swiss Tunnel Projects - Rockmore International
Beneath a Mountain in Switzerland Lies the World's Longest Shortcut | Travel| Smithsonian Magazine
The New Rail Link through the Alps (NRLA) serving Europe
Schweiz eröffnet Ceneri-Basistunnel | Aktuell Europa | DW | 04.09.2020
The Longest Tunnel in Europe, Switzerland, Gotthard Stock Footage - Video of perspective, destination: 158920416
Newly completed Swiss tunnel to transform European rail travel | News | DW | 04.09.2020
The Gotthard Base Tunnel | SBB
World's longest rail tunnel opens in Switzerland - SWI swissinfo.ch
List of tunnels in the Alps - Wikipedia
Gotthardtunnel: Durch den Berg - Auto & Mobil - SZ.de
Gotthard Road Tunnel - Wikipedia
Staunen über die Schweizer Präzision | Wirtschaft
World's Longest and Deepest Rail Tunnel, Through Swiss Alps, Opens - The New York Times
World's longest rail tunnel to open in Switzerland under Alps | Switzerland | The Guardian
New Swiss Alps tunnel set to transform Europe's rail links
World's longest railway tunnel, Gotthard Base Tunnel, Switzerland | AFRY
Eurotunnel – Wikipedia
World's longest, deepest train tunnel opens in Switzerland - The Verge
New Swiss Alps tunnel set to transform Europe's rail links - News - The Jakarta Post
