The Barsey Rhododendron Sanctuary lies in the south west corner of the West Sikkim district. The radius in which this majestic sanctuary spreads is over 104 sq. km, across the razor sharp Singalila Range. From this point onwards the natural international border with Nepal starts. So the tourists who visit Barsey Rhododendron Sanctuary automatically take a good visit to Nepal our neighboring country. In the South the Rambong Khola separates it from West Bengal. There are three points of entry, Hilley, Dentam and Soreng.