The region is so remote that it remained unconquered until the Russians exerted control in the mid-19th century.
The thickness of the walls decreases as the tower rises, giving the towers a slender, tapering profile.
Many of the towers have disappeared or are collapsing into ruins over time.
Other towers can be seen in Mestia and the frontier villages, such as Latali.
Sources:UNESCO/Lonely Planet/intergeorgia.info/NatGeo