Russias Secret Cities

Back in Soviet Russia there were secret cities. These cities were often the location of strategic military bases, nuclear plants, uranium production, etc. Often the inhabitants of these cities were gifted better schools, food, and luxuries in order for them to live there and have heavily restricted movement from the secret city. Even the Russian population didn't know about these cities until the late 1980s. As of today we know about 42 of the cities, but people suspect there are still 15 that are hidden from the population of Russia and the rest of the world.