Khertvisi fortress

Khertvisi fortress was first built in the 2nd century BC and is one of the oldest fortresses in Georgia.
It is situated spectacularly on a large rock in a narrow canyon at the confluence of the Mtkvari and Paravani Rivers.

The legend says, the fortress was conquert and destroyed by Alexander the Great on his march east towards India. 
This was one of several times over the centuries that the fortress needed to be rebuilt.
In the 13th century the Mongols destroyed it again.
In the 16th century the southern region of Georgia was invaded by Turks and the fortress was in their hands for 300 years.
At the end of the 19th century Georgian and Russian army recaptured the area and Khertvisi became the military base for Russian and Georgian troops.