Adi Ganga (Bengali: আদি গঙ্গা), also known as Gobindapur creek, Surman’s Nullah and Tolly’s Nullah, was the main flow of the Hooghly River from the 15th to 17th century but has subsequently virtually dried up.
Read more about Adi Ganga: History, 18th Century, 19th-20th Century, Presently, Extension of Kolkata Metro, Community Environmental Efforts