Visit Enchey Monastery in the morning, Namgyal Institute of Tibetology in the afternoon, and M.G. Marg in the evening.
Explore Pemayangtse Monastery in the morning, take a guided walk through the Rabdentse Ruins in the afternoon, and witness the sunset at Singshore Bridge in the evening.
Take a relaxing walk through Buddha Park and Ravangla Monastery in the morning, enjoy the views from Tendong Hill in the afternoon, and witness a Cham dance performance in the evening.
Visit Dubdi Monastery in the morning, explore Khecheopalri Lake in the afternoon, and walk around Yuksom Bazaar in the evening.
Visit the Seven Sisters Waterfall and Singhik View Point in the morning, go for a yak ride in the Thangu Valley in the afternoon, and relax at Chopta Valley in the evening.
Visit the Yumthang Valley and Zero Point in the morning, witness a Lepcha dance performance in the afternoon, and soak in the hot springs of Yume Samdong in the evening.
Visit the Tashi Viewpoint and Hanuman Tok in the morning, take a cable car ride to reach the Sikkim Himalayan Zoological Park in the afternoon, and witness the sunset at Ganesh Tok in the evening.
Other must-see attractions in Sikkim include Rumtek Monastery and Tsomgo Lake. You might also want to consider taking a short trek to Dzongri. To maximize your fun, try local dishes like momos and thukpa, and shop for souvenirs at the markets. Don't forget to carry comfortable shoes and warm clothing.