Croatia - Historical-Town Planning Ensemble Tvrda (Fort) in Osijek

"The area round the confluence of the Drava and the Danube abounds in major natural resources. It is also an intersection of major transport routes and a key strategic point. This is the reason why it has always been an interesting site for settlement and why everybody sought control over it. The right bank of the Drava, some twenty kilometres from its confluence with the Danube, was of particular importance because of the easy crossing at that point. The communication route ran from the pre-Alpine region along the right bank of the Drava and the Danube towards southeastern Europe, with a branching to central Europe at the same point. Therefore, not surprisingly settlements were established in the area already in prehistoric times..." Source: UNESCO World Heritage Tentative List

Aerial view of Fort Tvrda. Osijek, Croatia. Thanks to Aneta of Croatia.