Trip to the Past: Secret Soviet Cities, Mysterious Objects Filmed From Air
![Trip to the Past: Secret Soviet Cities, Mysterious Objects Filmed From Air](http://cdn3.img.sputniknews.com/images/102758/45/1027584529.jpg)
A unique list of secret cities and buildings of the USSR was published by RT channel. A drone managed to film five of the most interesting constructions surviving on the territories of different countries from the Soviet era.