It is located on the right bank of “Studen Kladenets” Dam. The most convenient approach to it is through a rope bridge over a natural narrowing of the lake in the area of “Shiroko Pole”, under the fortress “Monyak”. The Thracian fortress (IV-I centuries BC) starts about 200 m south from the village of “Chit kaya” (“chit” – wall; “kaya” – rock). It is built of unburned stones, encloses the northern accessible part and covers an area of 1200 sq.m. No organized excavations were carried out, so there are no registered buildings and other facilities in the fortress. The wall is difficult to see because of surrounding rocks, some of which are ruined by time. There are parts of altars, grooves and other facilities. Fragments of ceramic material are encountered. The rock wreath is impressive with its unique natural forms, resembling pyramids, mushrooms, figures of animals and people. From the height there is an exceptional view of the water area of “Studen Kladenets” Dam, Kardjali and the mouth of the Varbitsa River. Unobserved by humans, the rocks inhabited by many rare representatives of the ornitho fauna. Note: The site is suitable for hiking. No close access by car. The road is through a rope bridge, but it is extremely beautiful.