India`s 1st underwater metro starts in West Bengal
Written By Zee Media Bureau | Last Updated: Feb 13, 2020, 21:14 PM IST | Source: Zee News
India's first underwater train started in Kolkata which will go through a tunnel built inside Hooghly river. It will connect Kolkata to Howrah. Experts from Russia and Thailand also gave their inputs to built this underwater tunnel successfully inside the Hooghly river.