The fortress of Kosh (13th century) is located in the northern part, top of a hill with right-angled corners and circular towers, built with clear cut large tuff stone blocks, with the lower part consisting of rough-cut basalt blocks. The entrances are situated in the north and south with ceiling-covered corridors.
The citadel of Kosh (13th century) is situated on a hill with angular corners and circular fortifications, constructed from large, uncut stone blocks, while the lower part consists of roughly cut basalt blocks. The entrance passages are located in the north and south, beneath covered walkways.