Trashigang Dzong is one of the most strategically placed Dzong in Bhutan. It is situated in the ledge of a mountain with steep cliffs on the three sides overlooking the Dangmechhu River. Hence, the Dzong is only accessible from the North. Zhabdrung Ngawang Namgyal prophesied the founding of the Trashigang Dzong. He directed Trongsa Penlop, Chhogyal Minjur Tempa, to subdue the local chieftains and build a Dzong in order to spread the Drukpa rule.