panorama of the confluence usce of the rivers sava and danube, or dunav, with the skyline of novi beograd, or new belgrade

panorama confluence usce rivers sava danube or dunav skyline novi beograd new belgrade river kalemegdan tower park serbia srbija city architecture building urban old beogradska tvrdjava fortress castle nature outdoor serbian sky dusk travelling business capital centre landscape landmark cityscape kalemegdanski background travel balkans tourism monument picture municipality it central