Short description of Kalemegdan Photo Screensaver 1.0: Kalemegdan is the core and the oldest section of the urban area of Belgrade. The cliff-like ridge overlooks the Great War Island and the confluence of the Sava river into the Danube and makes one of the most beautiful natural lookouts in the area. First settlement was founded in the 3rd century BC by the Celtic tribe of Scordisci.Take a close look at this amazing historical place.