From Rangtong the train has to ascend by more than 1400 feet in just 12kms stretch to reach the next station Tindharia. Soon the line turns towards South into a long spur. In order to negotiate a steep rise of 137 feet in a short distance, there is a spiral or a double loop created here. The second loop is an engineering marvel and is one of the most complicated ones with a sharp curve in the loop. After the spiral, the line heads back towards the northern direction offering lovely view of the mountains and valleys. You can see the Bhutan range on the east. Below and on the south east, you can see the river Teesta flowing. Along the way you will encounter a zigzag (i.e. a reverse) on the track which is created to gain a steep height. This is another engineering feat. A spiral or a loop was not possible here. Then gradually the train reaches Tindharia. Tindharia is a small village and the name stands for 'three ridges'. In 1910, a Darjeeling Himalayan Railway workshop has been setup here for overhauling the toy train engines and repairing the coaches.