The South Caucasas countries are Armenia, Azerbaijan and Georgia. Inpsite of some of their shared recent history, all former republics belonging to the USSR, they are quite different countries today. Of the three Georgia is and always has been more Christian and more European, Armenia (don't think of the large Armenia diaspora in the US which is larger than the current population of the country), and Muslim Azerbaijan.
I can't travel to Armenia from Azerbaijan, the war between the two countries has been a ceasefire for years but sabers are rattling again..if the shooting starts, I'm outta of here. Tbilisi feels much more like a European city, very tourist friendly and much less repressed than Baku and Azerbaijan.
Here are a couple of photos...more later