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It is considered as the holiest monastery in Sikkim. It is situated on a cone-shaped mountain, 19 km south-east of Yoksum. It was erected in 1717, according to the legend on a place which was connected with the peak of Kanchenjunga by a rainbow. The monastery consists of several stupas (corten), chapels and the main temple. The relics of the lamas of Sikkims are preserved in a number of smalles chorten. The Nyingmapa-Buddha-Festival is celebrated in the monastery on the 15th day of the first month of the Tibetan moon calendar.