The three ex-Soviets all make intriguing destinations.
Armenia
I have been to Armenia once and had a wonderful time. I arrived by overnight train from Georgia, at one point sharing our compartment with a blind cat!
We actually arrived on Armenia’s Independence Day so we’re able to gatecrash a great party.
As well as the capital we explored several monasteries and the wine region. What a wonderful country.
Monastery Church, Armenia 
Geghard Monastery, Armenia 
Geghard Monastery, Armenia 
Wilbur Arrival By Overnight Train, Yerevan, Armenia From Batumi, Georgia 
Church Near Yerevan, Armenia 
Mount Ararat Through The Train Window 
Geghard Monastery, Armenia
Belarus
We stayed in the capital Minsk for four nights, arriving by long-distance train from Kaliningrad.
There was a strong air of Communism about the place. Minsk was afforded hero status by Stalin due to its efforts against the Nazis in WWII and Belarus remains very attached to Moscow.
We visited the state circus and the opera and enjoyed our time in the city.
Georgia
Minsk, Belarus 
Georgia
I have visited Georgia twice and absolutely loved it both times.
Tbilisi is a wonderful city and the countryside is equally enthralling. A trip on the Kukushka train line was a particular favourite.
Metekhi Church 
Mother of Georgia 
Trinity Church 
River Kura, Tbilisi 
Bridge of Peace 
Mushroom Building 
Tbilisi to Baku Train -Provdonistas Await Passengers
Wilbur's Travels 