The territory of northern Velebit was proclaimed a national park in 1999 due to the exceptional diversity of its karst phenomena, its rich biology and exceptional natural beauty on relatively small surface of 109 km2.
The Krka River is a natural karst phenomenon that consists of seven tufa barriers with a total downward gradient of 242 m. The most oft-visited parts of Krka National Park are the Roški and Skradinski Falls.