New Delhi: Whenever a seemingly impossible project is discussed in the world of engineering, Japan’s Seikan Tunnel is always mentioned. Built hundreds of feet below sea level, this tunnel has remained ...

Around the world, there are some truly iconic tunnels. From the engineering marvel of the popular Channel Tunnel linking the UK and France to the world's longest and deepest tunnel, the Gotthard ...

Japan spent billions, planned for decades, and took over fifteen years to connect its two largest islands by building the world’s longest tunnel with an underwater section. The Seikan Tunnel connects ...

The 53-kilometer Seikan is a railway tunnel in Japan with a 23-kilometer stretch that runs underwater, Before the Gotthard Base Tunnel came along, it was the world's longest and deepest rail tunnel.