Near Hilley, in West Sikkim is the Varsey Rhododendron Sanctuary. Sandwiched between the Singalila National Park in the south and Khangchendzonga Biosphere Reserve in the north, this small 104-sq-km sanctuary is at an altitude of 10,000 ft and supports a wide variety of bio-diversity. But the main attractions of the sanctuary are the rhododendrons which bloom in April-May coloring the Sanctuary in wild abandon. Hilley is the last motorable point before Varsey. A four-km walk through beautiful pine forests takes you to the Sanctuary. You can stay at the Gurash Kunj Lodge here.