Tashiding Monastery is a Buddhist monastery of the Nyingma sect of Tibetan Buddhism in Western Sikkim. It is located on top of the hill rising between the Rathong chu and the Rangeet River, 40 kilometres (25 mi) from Gyalshing and 19 kilometres (12 mi) to the south east of Yuksam. Tashiding Monastery (Gompa), is considered to be the most sacred and holiest monasteries in Sikkim.

Tashiding means “The Devoted Central Glory” and the monastery by this name was founded in 1641 by Ngadak Sempa Chempo Phunshok Rigzing who belonged to the Nyingma sect of Tibetan Buddhism.

The Tashiding Monastery is part of Buddhist religious pilgrimage circuit.

According to one local legend Guru Padmasambhava shot an arrow into the air to select the place. Where the arrow he shot landed, he sat in meditation and that site eventually became the site of the Tashiding Monastery. Another legend relates to the three monks who consecrated the first Chogyal of Sikkim at Yuksam saw an unusual divine phenomenon of bright light shining on top of the Kanchendzonga mountain, which reflected to a site near the place and concurrently, a scented smell of incense followed by all pervading divine music was also noted.

On the fifteenth day of the first month of the Tibetan New Year, devotees from all over Sikkim gather in Tashiding for the Nyingmapa Bhumchu festival, when they are blessed with the holy water from an ancient bowl said by legend never to dry up. Oracles consult the water’s level to determine the future. Bhumchu festival is linked by an ancient legend to Guru Padmasambhava.

Source:

https://en.wikipedia.org/wiki/Tashiding_Monastery

https://www.roughguides.com/destinations/asia/india/sikkim/west-sikkim/tashiding/