Aerial Towards Historical Landmark Fort Spitzberg-Ostrog In Srebrna Gora, Poland

fort spitzberg ostrog fortress historical srebrna gora poland fort spitzberg ostrog aerial 18th century attraction klodzko voivodeship lower silesia polish drone twierdza ruins lower silesian lower silesian voivodeship exterior ancient spitzberg ostrog old green stronghold historic architecture landmark military vintage military fort traditional sightseeing structure heritage building fortification defense defensive castle outdoor destination travel europe touristic tourism history