From all the Eastern European countries, only 6 of them used to belong to the Soviet block.
On the one hand, we had Belarus, Ukraine and Moldova and, on the other, Estonia, Latvia and Lithuania. And Russia, of course.
However, while Estonia, Latvia and Lithuania have become modern, Western countries and members of the EU, Belarus, Ukraine and Moldova seem to have stopped in time.
From ghost republics to old nuclear missile launch facilities and capitals filled with symbols honoring the old USSR leaders, despite belonging to Europe, these destinations are home to many secrets and pure Soviet attractions.
This is actual off the beaten track Europe.