Halesi Mahadev in Khotang in eastern Nepal has been a religious place for hindus as well as bhuddist since thousends of years. There are three caves that represent the three eyes of Shiva. Bhuddist who call these caves Maratika believe that Padmasambhava (the founder of Tibetan Bhuddism, the great Rinpoche) and his wife Mandarava freed themselves from the circle of lives and thus becomming immortal.