Buses, trams, trolleybuses, BusPlus tickets and taxis.
Belgrade has an extensive network of buses, trams and trolleybuses run by the city operator. Fares are paid with a BusPlus card, which you buy and top up at kiosks.
Useful
BusPlus card — buy it at a newsstand (Štampa etc.), top it up for the number of rides you need and tap it on board when boarding.
Taxi — use authorised taxi companies or apps; check that the meter is running.
Walking — the centre of Belgrade (Knez Mihailova, Kalemegdan, Skadarlija) is easily explored on foot.
Ada Ciganlija and river clubs — easiest reached by taxi or bus.