3pm: Wander Kalemegdan, the ruins of a fortress built to keep out the Ottomans, who invaded and adapted it as their own defensive outpost on the hill overlooking the confluence of the Sava and Danube.
3pm: Wander Kalemegdan, the ruins of a fortress built to keep out the Ottomans, who invaded and adapted it as their own defensive outpost on the hill overlooking the confluence of the Sava and Danube.
