Early morning go for sunrise from Lungthung Viewpoint. After breakfast, proceed towards Nathan valley day trip via Zig Zag road, Thambi viewpoint, Lungthung, Tukla Valley, Jelep La Pass view and Yak golf Course
Zig Zag Road - Zig Zag Road or Bhulbhuliya is a one in kind of road in the entire Sikkim. This spiral road has so many hairpins bent (almost 32) and counts as the top 10 dangerous roads in the world. One can get a splendid view of Zuluk from every hairpin bend of the road.
Thambi Viewpoint [Altitude: 11,200 ft.] - At a distance of 14 km from Zuluk and at a height of 11200ft Thambi viewpoint offers a splendid view of Mt Kanchenjhangha and another snowcapped mountain. It is located on a famous hairpin bent named zigzag road or bhulbhuliya and a must-see spot.
Lungthung [Altitude: 11,500 ft.] - Lungthung is a small village located at a height of 11600ft on the old silk route and it offers a panoramic view of Mt Kanchenjhangha.
Tukla Valley [Altitude: 12,500 ft.] - Another must-stop destination is Tukla valley at an altitude of 11600 ft. You also find a war memorial over there in the memory of British soldiers fought in the War of Tukla.
Jeelpla Pass View [Altitude: 13,999 ft.] - Jeelp-la pass which means The Lovely Level Pass located nearby Tukla valley at an altitude of almost 14000ft. It is a mountain pass between India and Tibet Autonomous Region (China). It directly connects India to Lhasa in Tibet and used by ancient traders of the Silk route. Although it is higher than Nathula pass but the easiest pass among the entire pass in Sikkim. Nowadays the pass is prohibited for civilians.
Old Baba Mandir [Altitude: 13,123 ft.] - Old Baba Mandir is dedicated to Baba Harbhajan Singh the martyr of 23 regiments of the Indian army. It is the original bunker of Baba where he stayed during the Indo China War in 1962. The temple is maintained by the Indian army. Finally, reach Gnathan valley before lunch.
Nathang Valley [Altitude: 13,200 ft.] - Or Nathang Valley is popularly called the "Ladakh of East India". Situated at the height of 13,000 ft. above the sea level, Nathang Valley is one of the most beautiful places in Old Silk Route Tour surrounded by snow-capped hills and mountain landscape. Nathang Valley is the most scenic destination in the whole of Old Silk Route. Few streams crisscross the valley and prayer flags flutter on the mountain edges on this vast plain of nothingness. Nathang Valley appears in different colors at different times of the year. In autumn it looks golden when the grass dries up, in the rainy season it's covered in flowers and in winter it is buried in 5 feet of snow. After a full day excursion, return back to Homestay in Zuluk in the evening for Night Stay.