Location
Golubac, in the Braničevo District of north-eastern Serbia and on the modern-day border with Romania, marks the entrance to the Đerdap national park. It is strategically located on the embankment of the Danube River where it narrows to form the Iron Gate gorge, allowing for the regulation and taxation of traffic across and along the river. In the Middle Ages, this was done with the aid of a strong chain connected to Babakaj, a rock on the far side of the river.
Read more about this topic: Golubac Fortress