Fortress Monyak is located in the Rhodopes 11 km east of the town of Kardzhali near the village of Shiroko pole. Fortress Monyak is surrounded by the Studen Kladenets dam. It is one of the highest and largest medieval fortresses in the Rhodopes with a protected area of over 50 decares.
It is situated at 586 meters above sea level, and the height above the Studen Kladenets dam is 400 meters. In some places, the rocks below the fortress are almost vertical, making the view very extreme but also very beautiful.
The fortress can be reached by foot in about an hour on a slight steep climb. Before the village of Shiroko Pole, the road is immediately on the right, which almost goes in the opposite direction as it comes from Kardzhali. The car road is about 2 km and then the other 2 km on foot.
Built in the XII - XIII century, the fortress played an important strategic role because it guarded the iron gate and the medieval town, situated near the monastery of Saint John Prodrom, located in today's town of Kardzhali. In 1206, the fortress was besieged by the Latins during the Fourth Crusade. Here was crowned the second and final emperor of the Latin Empire, Henry (the brother of the dead Baldwin Flanders).