We had a great tour. Our guide, Andrija, was very kind and professional and we learned a lot about Serbian history and also about life and developments in modern Serbia. The monasteries on Fruska gora are notable for their history and architecture, revered Ortodox relics and thombs of some Serbian aristocrates from the past. Sremski Karlovci is worth to see as it keeps an ensemble of Barroque architecrure from the Austrian times - we saw a movie being shut downtown right when we visited it. The giant Pertrovaradinska fortress is now turned into a park and it offers a magnificent view on the Danube valley. Novi sad, which is the last stop of the trip, is a large city with a vibrant centre with a great arity of cafees and restaurants, a couple of walking zones and a number of cites to see and visit as the oldest Serbian theatre and cathedrals belonging to all of the confessions , which meet here.
The tour lasts for about 7 hours including ~1h to travel back to Belgrade. Thisis enough to see different places and learn a lot about the country, but yet not too tiring for 1 day trip. Highly recommended to take it if you stay in Serbia for more than juat 1 weekend and it is a great choice for the fall and winter season.