Kachaghakaberd (fortress) built
801 CE.
Shown on the map at 40.007°, 46.599°.
Kachaghakaberd (Armenian: Կաչաղակաբերդ, Azerbaijani: Qaxaç qalası) is a mountain-top fortress located between the villages of Kolatak and Khndzristan, in Khojaly District of Azerbaijan. The Janapar Trail runs very near to the fortress. A short side trail takes to the top of the fortress.
Text from the Wikipedia article Kachaghakaberd, licensed CC BY-SA 4.0.