Qaxaç Qalası, or Kachaghakaberd is a mountain-top fortress in the Khojali District of Azerbaijan, and in the Martakert Province of the unrecognized Nagorno-Karabakh Republic.
The Janapar Trail runs very near to the Fortress. A short side trail will take you to the top of the Fortress.
Wikipedia https://en.wikipedia.org/wiki/Kachaghakaberd
Official Website http://www.armeniapedia.org/wiki/Kachaghakaberd
Address Azerbaijan
Coordinates 39°58'18.33" N 46°36'53.465" E