The Maharashtra Metro Rail Corporation (Maha-Metro) found two mysterious tunnels on March 26 at Swargate in Pune while carrying out its underground work for laying the metro rail line. On Thursday, it was revealed that the tunnel is more than a century old and was built by the Britishers for water management. The spot was inspected and two channels were found to be 57 metres in length, six feet in height and closed at both ends. It was assumed that the tunnels must have been a water treatment plant built by the British governing agencies.