The place is abandoned unfortunately.
But around the mountain, you can walk to the cross
The view from the fortress to Borjomi is beautiful + you can climb higher
The fortress is almost destroyed, almost nothing remains, it is not being restored. Honestly, there's nothing to watch! But there are very beautiful views of the city.
There is nothing special in the fortress itself, worse than the others, but the view from there is very cool and it is very easy and quick to climb it.