Kupa

The Kupa River rises from a turquoise-green karst lake in the Risnjak National Park near the town of Razloge in Gorski Kotar. About 100 m downstream, it receives water from the occasional torrential stream Krašićevica on the right, and further on from the occasional stream Sušica on the left, and turns northeast and then north. Below the source of the Kupa, it is a fast river, while after a few kilometers it calms down and becomes a calm river intersected by many artificial waterfalls that in history were used to power watermills: mills and sawmills. The border river becomes the mouth of the left tributary Čabranka into the Kupa.