TripAdvisor has hotel and restaurant recommendations as well as some great organized tours you can consider exploring if your time allows.
There are many wonderful restaurants and coffee shops in the city Novi Sad. Here are a few of our favorites: Loft (has multiple locations), Coffedream, Kafeterija (has multiple locations), Toster Bar (for burgers), Corso, Maša, Suvenir, Camelot, Piknik, Aqua Doria, Terasa, Agape Villa, Zak, Park Novi restorani, Cubo, Kuća Mala, Project 72, Restoran kod Fazana (oldest restaurant in Novi Sad with authentic Serbian food), Sokače, Salaš 137, Tramontana for great pizza, Opera, Petrus, Alla Lanterna.
Most walking tours in Novi Sad include the tour of the City Center and the Petrovaradin Fortress. Example linked.
Petrovaradin Fortress is a monumental site in Novi Sad with a very rich history. Example linked:
Fruska Gora is a mountain across the river from Novi Sad. There are 16 monasteries remaining active there that you can visit. Example linked:
Sremski Karlovci is a town in the suburbs of Novi Sad that is famous for its big beautiful church and wine country, There is a wine festival held there every year in September. Example linked:
Belgrade, which is Serbia's capital, is only a 35minute express train ride away from Novi Sad. If you are staying in Serbia for a few days, we recommend you explore the gorgeous capital and its historic monuments.