Gotthard Base Tunnel

The Gotthard Base Tunnel is the world's longest railway tunnel, running beneath the Swiss Alps between Switzerland and Italy. Spanning approximately 57 kilometers (35 miles), it allows trains to travel quickly across the mountains, significantly reducing travel time compared to mountain routes. Built to improve transportation efficiency and reduce environmental impact, it provides a direct, high-speed rail connection that enhances trade and mobility in Europe. The tunnel's engineering involves advanced construction techniques to ensure safety and stability in challenging geology, making it a major achievement in modern infrastructure.