This impenetrable fortress was built in the city of Yaysi in the year 1650 AD. It is the largest fortress in the city and extends over an area of 40 acres, equivalent to 160,000 square meters. The greater part of the fortress building is located adjacent to the old town, surrounded on the other sides by vast forests and beautiful vegetation. Visitors come to the fort to see its long and eventful history, as it was seized by many invaders through the ages.