Anacopia Fortress

Anakopia Fortress is an ancient military citadel in New Athos in the disputed Abkhazia, Georgia located some 22 km by road along the coast from Sukhumi. The site, approximately 450 × 150 meters in dimensions, is located a mile or so inland, at the top of the Iverian Mountain. It is the most complete surviving building of ancient Anakopia, the former capital of the Kingdom of Abkhazia.

Source: Wikipedia