Doboj is a vibrant city in Republika Srpska situated on the banks of the Bosna River in Bosnia and Herzegovina. Visit Doboj Fort, a large stone structure built in the early 13th century overlooking the Doboj valley. The fortress served as the entry into Bosnia. The hilltop of the fortress provides incredible views over Doboj city. Enjoy a picnic at Goransko Jezero, an artificial lake located on Mount Ozren. Visit Park Narodnih Heroja, a sprawling park in the center of the city ideal for a jog or a walk. The park is also home to a 14-meter high monument erected in memory of national heroes and partisans from Doboj.