One day in Belgrade. Kalemegdan and Belgrade Fortress

If you have only one day in Belgrade, then I’d suggest you visit Kalemegdan park and Belgrade Fortress. To be in Belgrade and not see the fortress is same if you come to Rome and avoid seeing Colosseum. As for Kalemegdan (park where fortress is located) is a great place for a whole family. And if you are not that interested in exploring medieval fortress, then there are other things you could do and check in this park.