World's Deepest Underwater Tunnels: From Japan to Turkey, India to Build Brahmaputra Tunnel
World's Deepest Underwater Tunnels: From Japan to Turkey, India to Build Brahmaputra Tunnel
- •Seikan Tunnel (Japan): World's longest underwater railway tunnel (53.85 km total, 23 km underwater), connecting Honshu and Hokkaido, suitable for bullet trains.
- •Channel Tunnel (UK and France): Also known as 'Eurotunnel', 50.45 km total, 37.9 km underwater, vital for European trade and tourism.
- •Marmaray Tunnel (Turkey): One of the world's deepest 'immersed tube' tunnels, connecting Asia and Europe beneath the Bosphorus, earthquake-resistant.
- •Ryfast Tunnel (Norway): World's deepest underwater road tunnel (292 meters below sea level), 14.3 km long, connecting Stavanger to Ryfylke.
- •Hong Kong-Zhuhai-Macau Bridge Tunnel (China): World's longest 'bridge-cum-tunnel' system (55 km total), includes a 6.7 km underwater tunnel, reducing travel time.
