Khangma Chorten is also known Samdruptse stupa. The exact year of construction for the Samdruptse stupa remains unknown. According to an inscription on a stone in front of the stupa, it was built during the ‘Wood Female Snake Year” of the Bhutanese calendar. The construction was initiated by Tshewang Samdrup, who was a carpenter by trade, with the assistance of his co-workers Samdrup Wangzom, Tsewang (his father), and Wang Lhamo (his mother). Named Samdruptse, the stupa was dedicated to the well-being of all sentient beings and to honor the Kagyu lamas.
Legend has it that during the construction, Samdrup faced significant challenges of finding suitable stones. According to local lore, he received a prophetic dream directing him to a site where perfectly shaped stones were hidden. These stones were used in the construction until they mysteriously vanished. Consequently, ordinary stones were employed for the upper layers of the stupa, which are now distinguished by different shapes and sizes of stones.
Locals believe that a live mithun was placed within the stupa’s base as per the prophecy, and the mithun’s distinctive mooing lasted for a week. Some locals believe that its call can still be heard on auspicious days. Others claim to have seen a bright light, believed to be the presence of dakinis, illuminating the area around the stupa.