valley of arda river near madzarovo, bulgaria, eastern rhodopes. summer day in bulgaria. river landscape with green hills. traveli

arda balkan band bend bulgaria canyon cliff cloud curve czech desert eastern europe famous formation geological grand green hills horseshoe landform landmark landscape madzarovo majestic natural nature near night panorama rhodopes river rock sandstone scenic star stone summer sunlight sunset terrain travel traveli valley view village vista vltava water wild wilderness with wonder