FreeThe heart and symbol of Belgrade: a free, open-air fortress on the ridge above the meeting of the Sava and Danube, wrapped in the shady paths of Kalemegdan Park and crowned by the Victor monument. Come for the sunset view.
The classic day out from Belgrade: across Fruška Gora to Krušedol Monastery, a wine tasting in baroque Sremski Karlovci, the ramparts of Petrovaradin Fortress and three hours in the elegant centre of Novi Sad.
Full day (8 to 9 hours)$$Book on Viator → 
A small, much-loved museum in a Vračar villa devoted to the inventor Nikola Tesla, seen on a 45-minute guided tour with working models of his machines, his personal belongings and a short film. Bring cash in dinars.
A three-hour small-group walk with a local guide from the National Parliament along Knez Mihailova to the Belgrade Fortress, the best way to make sense of the city on your first day.

Two and a half hours beneath the Belgrade Fortress and the old town: a Roman well, an Austrian gunpowder warehouse, tunnels and a Cold War bunker, finished with a glass of sparkling wine by the river.
2 hours 30 minutes$Book on Viator →
FreeOne of the largest Orthodox churches in the world, a white-and-green domed giant on Vračar hill with a dazzling gold mosaic interior and a richly decorated crypt. Free to enter and visible from all over Belgrade.
45 minutes to 1 hourDetails → A four-hour guided journey through Tito’s Belgrade, by foot and by trolleybus, to the Museum of Yugoslavia and the House of Flowers, where the Yugoslav leader is buried. Socialist history, told with humour.
Three and a half hours of eating your way through Belgrade with a local guide, from market stalls to traditional kitchens, tasting the burek, cheeses, grilled meat and rakija that define Serbian food. Come hungry.
3 hours 30 minutes$$Book on Viator → A private day in the hills north of Belgrade: medieval monasteries hidden in the forests of Fruška Gora National Park, the baroque town of Sremski Karlovci and Novi Sad, with a home-cooked meal and wine.
Full day (7 to 8 hours)$$$Book on Viator →
FreeA town within the city: the old Habsburg streets of Zemun, the Gardoš Tower viewpoint on its hill and a long Danube promenade lined with fish restaurants. A free, easy half day across the river.