Keselo
Georgia
Keselo is a small medieval fortress just above the village of Omalo in Tusheti (historic geographic area in eastern Georgia). The site is surrounded by the northern slopes of the Greater Caucasus Mountains. It is bordered to the north and east by Russia, to the east by the Georgian historic provinces Kakheti and to the south by Pshav-Khevsureti. The population of the area is mainly ethnic Georgians called Tush or Tushetians (tushebi), However, there are some villages nearby which are populated by Daghestanis.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).