Gasa Dzong, also known as Tashi Thongmon Dzong, which translates to “The Fortress of the Victorious Black Hat,” is a majestic and strategically important fortress located high above the Gasa hot springs. Built in the 17th century by Zhabdrung Ngawang Namgyal, the unifier of Bhutan, it served as a key defensive outpost against Tibetan invasions from the north and as an administrative and monastic center for the remote district. Its unique circular shape, with three watchtowers, makes it distinctive among Bhutanese dzongs.

The dzong offers spectacular panoramic views of the surrounding mountains and valleys, often covered in snow during winter, creating a dramatic backdrop. Despite its remote location, the dzong remains an active center for administration and monastic life, housing a small community of monks. A visit to Gasa Dzong provides a profound sense of history, a glimpse into Bhutan’s northern frontier defenses, and an appreciation for its enduring spiritual heritage amidst breathtaking natural beauty.