Swiss Alps Tunnel

Switzerland Built the World's Longest Tunnel

World's longest tunnel opens deep beneath Swiss Alps

CNN

Why Switzerland Has 374,142 Bunkers (and likely more)

Abstract performance to celebrate Switzerland's rail opening - Daily Mail

The Gotthard Base Tunnel in Switzerland | Made in Germany

Keeping the world's longest railroad tunnel safe

World's Longest Tunnel - How It Was Built - Full Documentary

Why Europe is Building a 57KM Tunnel Through a Mountain

Why Switzerland has Bunkers for their Citizens - Secret - Hidden in Swiss Mountains

Gotthard Base Tunnel: The World's Longest Railway Tunnel

Tunneling Under the Alps | Extreme Engineering

Bizarre Opening Ceremony For Gotthard Base Tunnel Complete Unedited Part 1

Dark Horse News

INCREDIBLE SWITZERLAND BIGGEST TUNNEL BORING MACHINE DIAMETER-HOW DOES TUNNEL BORING MACHINE WORK?

Science & Technology UI

What is the Longest Deepest Tunnel in the World? (Gotthard Base Tunnel)

Concerning Reality

Ritom Pumped-Storage Plant Project – Tunneling under extreme conditions

Going Through The World's Longest Tunnel - St. Gotthard Tunnel - Switzerland

How Switzerland Became Unconquerable

OBF

The world’s longest and deepest rail tunnel runs through the Swiss Alps

World's longest tunnel opens beneath Swiss Alps

Swiss Railway: Longest and deepest rail tunnel in the world