Ashish and John try to figure out an easy way of entering the tunnel. Most of the tunnels portals are obscured by mounds of rubble.
Old timers who worked this line had told us to expect walls erected by the railways when the track was decommissioned to prevent people and animals from entering the tunnels. Maybe the rubble is from the remains of these walls. The rubble could also have been deposited by the rain running over the steep hill side.