The loco leads the train into tunnel 23 which would open into the Monkey Hill yard. While the tunnel has two single lines, the down (climbing) line has a small opening through which the train can be seen - opening for ventilating the steam engines of the yore - a climbing loco would smoke more than the descending? Near Monkey Hill in the Bhore ghats, 2004-03-06. By Apurva (iti@vsnl.com).