Z REVERSE No.1 (ZIG ZAG RAIL LINE) of Darjeeling Himalayan railways .

On the way from New Jalpaiguri to Darjeeling, exactly 2 kilometers away from Rongtong, lies the first z-reverse of this section, which you can see in this video. The Darjeeling Himalayan Railway has a total of 6 z-reverses, out of which the smallest z-reverse is number 4.