Dro-dul Chorten Stupa, Sikkim is near Research Institute of Tibetology and is located on a hillock. It was constructed by Trulshik Rinpoche, chief of the Nyingma order of Tibetan Buddhism in 1945. The stupa has a golden dome at top which can be seen from various places in Gangtok.
This place was once haunted by evil spirits and many people who wandered around the place became victims and died. Trulshik Rinpoche came to this place for hermitage and later while construction drove the spirits away. The place is surrounded by 108 Mani Lhakor (prayer wheels) with mantras inscribed on them in Tibetan. The devout Buddhists turn the wheels in the clockwise direction while chanting 'Om Mane Padme Hum meaning ‘O Jewel in the Lotus’ to invoke the Bodhisattva. The stupa preserves Dorjee Phurba, Kanjur holy books, relics, books of mantras and various other religious objects.