ruins of historical fortress in srebrna gora, poland.

18th ancient architecture bastion bedrock century construction cultural culture damaged destroyed environment festung fort fortification fortifications fortress frederick gora green grow growing heritage historic historical landmark landscape lower military monument mountain mountains museum natural nature nobody old outdoor outdoors outside owl past plant plants poland protection prussia remains rock rocks ruin ruins scenery scrubby shrubs silberberg silesian silesia silver sky srebrna srebrnogorska stone stones stronghold sudetes tall tourism travel tree trees vegetation vertical view vintage wall walls wild