Brimming with enchanting beauty, Varsey is a butterfly shaped rhododendron sanctuary that sprawls in 104-sq-km area. It was declared a sanctuary in 1996. This wildlife attraction in Geyzing, Sikkim is known for its wide variety of rhododendron and several other species like Oak, Primula, Pine and Magnolia. The fauna that can be witnessed in the sanctuary includes Leopard cat , Himalayan Yellow Throated Marten , Himalayan Palm Civet, Himalayan Langur, Crimson Horned Pheasant, Monal Pheasant, Kaleej and many other species of birds. Situated on the Singalila Ridge, the view which the sanctuary offers of that of snowy peaks of Khangchendzonga is worth appreciating. Varsey is can be accessed from its three different gates, Hilley, Dentam and Soreng and is best explored on foot. During the walk towards the valley you may also see red pandas which are an endangered animal. The place's natural essence certainly gives a welcoming vibe to the visitors.

The sanctuary is one of the best places to visit for nature lovers and adventure seekers. It offers scenic view of the Khangchendzonga Mountain and attractive blooms of rhododendron flowers. Also, it has several trekking trails like that from Uttaray and Dentam.