UFO building on the top of the Mountian - Buzludzha
On foot, Oh, miserable serfs! On foot, you slaves of work! Suppressed and humiliated, stand up against the enemy! Let's without pity, without mercy demolish...[I can't read the rest of the last two lines].
On the right hand side: Male Workers, Female Worker from every where come together. Charge (Forward)! Comrades courageously to build our great deed. To work and to create - to enlighten the worker!...[Again I'm unable to read the last two lines].