Fly-by aerial drone shot of the sides of the Belogradchik natural rock formations at the foothills of the Balkan mountains in the province of Vidin in Northwestern Bulgaria

belogradchik vidin province bulgaria northwestern balkan mountains danube river belogradchik rocks tourism medieval fortress magura cave baba vida kaleto the fortress roman empire fortified walls ivan stratsimir ottoman conquest castle architecture europe rocks tourists scenic picturesque view tourist spots travel aerial drone shots panoramic historical culture world heritage unesco rock formations natural nature educational geologic structures morphological massif sheer columns ecotourism attractions destinations adventures town mountain range crags boulders