Membar Tsho (Burning Lake), where sacred scriptures hidden by Guru Rimpoche in the 8th century were later recovered by Pema Lingpa in the 15th century
and the seat in Bhutan of Peling Sungtrul, who is revered as the speech incarnation of Pema Lingpa.
There are many significant Buddhist sacred sites nearby the town, such as Kurjey Lhakhang, which holds a body print of Guru Rinpoche; Jambey Lhakhang, one of the 108 monasteries that in mythology were miraculously constructed by King Songten Gampo in one night; and Tamsshing Lhakhag established by Terton Padma Lingpa (1450–1521).
The Dzong houses the most sacred relics of the Southern Drukpa Kagyu school including the Rangjung Kasarpani, and the sacred remains of Zhabdrung Ngawang Namgyal and Terton Padma Lingpa.
Yagang Lhakhang, located in a village on the outskirts of Mongar town, was built in the 16th century by Sangdag, the youngest son of Terton Pema Lingpa.