The fort with stone walls and towers is located on the height of 3000 m above sea level surpassing the valley of the river Panj running 400 m below. Only the upper bastion, that was well protected, has survived from the entire fortress. The place chosen for the construction of the triangular-shaped Yamchun fortress was excellent as the mountainside is protected from two sides with deep gorges of rivers, so it was hard to assault the fortress from this side, and the third side has a steep slope where they made a cascade of walls and towers, thus if the lower tier would have been lost, defenders could retreat upwards still keeping the strategic advantage. The protected part of the fortress has an area of approximately 300 sq. m and in the far past, the fortress used to have a territory of 75 ha.

The walls of the Yamchun fortress are made of stones, of different rocks, some of which were delivered from afar. The triangular shape fort is divided into 3 sections. The first section includes a citadel with a bastion and a barracks. This section was surrounded by a wall and strengthened with round towers. Two other sections are open grounds for combat operations. Every ground was surrounded by thick stone walls and fortified by 36 towers. The outside walls are 2 meters wide while the inner walls are 50-60 cm wide. Furthermore, thanks to the investigation of masonry, it was discovered that thin layers of timber were added during construction that would add flexibility and strength in case of earthquakes. The towers were built in chess order and with a small negative angle to improve visibility at the fortress basement. Gun slots exist both outside and inside walls increasing the defense capability. The building materials must have been delivered from remote locations, since metamorphic rock, granite and slate rocks, biotite pieces and other forms of stones are not found in the close neighborhood.