aerial drone view of stronghold on birow hill. recoanstructed stronghold on birow hill in the czestochowa upland in the village of

stronghold birow hill fortress reconstruction medieval aerial drone view podzamcze ogrodzieniec poland limestone rock autumn czestochowa upland landscape historic architecture fortification hilltop nature valley forest stones defense heritage ancient ruins scenic autumnal countryside panoramic elevated archaeology sky castle rocks trees leaves hillside outcrop rural cultural tourism structure hill recoanstructed village autumn reconstructed