Kolkata's First 'Underwater' Metro: How are Tunnels Built Un

Explained: The world's first underwater tunnel was created beneath the Thames River, which flows through London

Related Keywords

London , City Of , United Kingdom , Howrah Maidan , West Bengal , India , France , Kolkata , English Channel , United Kingdom General , Rotherhithe , Southwark , Hooghly River , French , British , Wikimedia Commons , Marc Brunel , Kausik Mitra , Indian Railways , Metro Railway , Thames River , Thames Tunnel , Channel Tunnel , Euro Tunnel , Ted Williams Tunnel , Logan Airport , Latest Explainers , Metro ,