Osijek is the fourth largest city in Croatia with a population of 108,048 in 2011. It is the largest city and the economic and cultural center of the eastern Croatian region of Slavonia, as well as the administrative centre of Osijek-Baranja County. Osijek is located on the right bank of the river Drava, 25 kilometres (16 mi) upstream of its confluence with the Danube, at an elevation of 94 meters (308 ft).Osijek remains a popular domestic tourist destination for its Baroque style, open spaces and ample recreational opportunities.
The most important sights in the city include the main square, Trg Ante Starčevića, Tvrđa the 18th century Baroque citadel, the promenade along the Drava (“promenada”), and the suspension pedestrian bridge towards Baranja.
The Municipal Park of King Petar Krešimir IV and the Tomislav Park date from the beginning of the 20th century, and are protected national landmarks. Osijek is also home to one of the few Croatian zoological gardens, along the Drava river. The city is home to a monument to Ante Starčević.
The Co-cathedral of St. Peter and Paul (Sv. Petar i Pavao) is a Neo-Gothic structure with the
second highest tower in Croatia after the Zagreb Cathedral. The tower measures 90 m (295.28 ft) and can be seen from throughout Osijek. Because of its size most locals refer to it as the cathedral but it is only a parish church.