Indiatimes.com | Kolkata Working On An Engineering Marvel - India's First Underwater Metro Link Indiatimes.com Kolkata Working On An Engineering Marvel - India's First Underwater Metro Link. Neha Borkar. June 11, 2017. The 'City of Joy' is about to experience a wonder in the form of an underwater Metro train which will run beneath the Hooghly river. It's one of ... |