On a clear day, one can see Gangkhar Puensum, Bhutan's highest peak, from Thrumshingla pass. After crossing the pass, for a drive to Sengor the road descends about in . After Sengor the road begins its descent into the Kuri Chhu valley. Numerous waterfalls and streams slide down the sharp cliffs and leap onto the road. In some places the road is critically cut into the side of the vertical cliff. Finally the road leaves Thrumshingla National Park area and emerges into the upper part of the large valley of the Kuri Chhu, lush with bamboos and ferns. The area is also good for bird watching. The winding road gradually descends through corn fields, rice terraces and tropical fruit plants begin to appear. At Zuri Zampa (bridge) it gets to the lowest point at , after a marked descent of about from Thrumshingla Pass