Rijeka, also known as Fiume, represents the main port city of Croatia. It has been shaped by various influences over the centuries, including Austro-Hungarian and Italian ones. Panoramic view from Trsatski kaštel in SW direction to the valley of the Rječina river, dominated by old industries (foreground), the central districts of Školjić-Stari grad and Luka (left centre), and the tall residential buildings of Kozala (right centre). Istria with the Učka mountains (Vojak, 1401 m) is shown in the back, on the other side of the Kvarner Gulf.