Kelasuri Wall
Georgia
The Kelasuri Wall or Great Abkhazian Wall is a stone wall located to the east of Sokhumi in Abkhazia, Georgia. The exact time of its construction is not known; several dates ranging from antiquity to the 17th century were suggested, although more recent works have provisionally favoured construction in the 6th century AD. The wall featured about 300 towers, most of them now entirely or largely ruined.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).