The Nyingma tradition of Tibetan Buddhism holds that gurus of the past like Padmasambhava concealed texts, objects, and even hidden lands (Tib. beyul) throughout the Himalayan landscape, meant for later generations to discover at the time the teachings are needed. Tantric practitioners and yogis who discover these treasures are called terton, or “treasure revealers.” Treasure revealers can also uncover “mind-treasures,” revealed to them by deities or lineage masters in dreams and visions. There are treasure-revealers in the Bon tradition as well.