Nepal Pilgrimage

Right to the temple of Sesh Narayan facing south is the cave Yanglesho where buddists believe Guru Padma Sambhava / Padmasambhava or better known as Guru Rinpoche who is the founder of Tibetan Buddism fought with snakes and turned them into stones. Guru Padma Sambhava also atained the Mahamudra vidyadhara level here which is the third level of the four vidyadhara levels.

Sources:
Rigpa Wiki Four Vidyadhara levels
Rigpa Wiki Mahamudra vidyadhara
Rigpa Wiki Pharping