An underwater tunnel is a tunnel which is partly or wholly constructed under the sea or a river. They are often used where building a bridge or operating...

East West Metro Tunnel is an underwater river tunnel of Kolkata Metro in Kolkata, West Bengal. The river tunnel is constructed underneath Hooghly River...

and tunnels have broken or set records. Opened in 1927, the Holland Tunnel was the world's first mechanically ventilated underwater vehicular tunnel. The...

Karnaphuli Tunnel (Bengali: কর্ণফুলী টানেল), previous name Bangabandhu Sheikh Mujibur Rahman Tunnel, is an underwater expressway tunnel in the port city...

through the access tunnel, Paul is attacked by an unknown creature, dragged underwater, and killed. Before the team leaves the access tunnel, they find that...

continuous underwater tunnel for vehicular traffic in the world. The Holland Tunnel was the world's first mechanically ventilated tunnel. Its ventilation...

A shark tunnel (or aquarium tunnel, acrylic tunnel and exhibit tunnel) is an underwater tunnel that passes through an aquarium, typically with sharks and...

to keep the Thames Tunnel dry Brunel's Thames Tunnel BBC News – Slideshow of Thames Tunnel images London's Oldest Underwater Tunnel Archived 8 July 2010...

century old: the original Thames Tunnel was the world's first underwater tunnel. The figure and list above leaves out a tunnel to the site of the old Ferranti...

underwater tunnels, the two most common being bored tunnels or immersed tubes, examples are Bjørvika Tunnel and Marmaray. Submerged floating tunnels are...