Fort Srebrna Gora - Former Military Fort In Lower Silesian Voivodeship, Poland

fort srebrna gora fortress military military fort lower silesian poland fort srebrna gora silver mountain fort silesia tourism kingdom of prussia travel lower silesia scenery hill aerial outdoor drone gibraltar of prussia historical museum green polish nature former castle twierdza srebrna gora monument sudetes gibraltar of silesia village lower silesian voivodeship above defence landmark silver mountain mountain srebrnogorska voivodeship historic trees forest sudety fortification architecture landscape