The Iskar Gorge is a  gorge passing through the Balkan Mountains (Stara Planina) in Bulgaria. It is the chief pass through the Balkans, which otherwise cross northern Bulgaria in a solid line.
The Iskar Gorge is a passage through the Balkan Mountains (Stara Planina) in Bulgaria. The Balkans themselves form a continuous ridge across northern Bulgaria, with the gorge serving as their key crossing point.