“The Unconquered City,” located 20 km from the confluence of the Drava and Danube rivers. The greenest Croatian city, boasting 17 parks. The Baroque Tvrđa is the best-preserved complex of its kind. The churches of St. Peter and St. Paul stand shoulder to shoulder with the cathedrals of Zagreb and Đakovo. Wide Secessionist streets reminiscent of Vienna… Osijek is also interesting for its tram. It is the only city in Slavonia, and alongside Zagreb, where trams run through its streets. It was also the first city in Croatia to adopt this, then very modern, mode of public transportation.