Close to Sibenik is the estuary of the river krka. Along the 72 km long path from its spring under the mountain Dinara to the sea the Krka flows forming many waterfalls. With ist seven plaster waterfalls: Bilusi¥a buk (22 m), Skori¥a buk or Brijan (15 m), Manojlova¥ki slapovi (a row of waterfalls 60 m high, with the main step of 32 m), Rosnjak (8 m), Miljacka slap (26 m) and Skradinski buk (17 steps, 46 m high), and its total difference in altitude of 242 m, the Krka represents natural, Karst phenomenon, so this territory is under protection as a national park since 1985. Its total area is 111 km2 by the river, or more precisely 2 km downstream of Knin, and the lower part of the ¥ikola river. This territory is characterised with especially abundant flora and fauna. There are 860 species and subspecies of plants, among which there are also Illyric-Adriatic andemic ones. In the Krka there are 18 species of fish, 10 of them endemic.

There are numerous traces od ancient settlements, as well as historical and cultural monuments. The oldest record of human existence date from the Palaeolithic. Here are also the remnants od the aqueduct of the Roman Scardona, and on the territory of the national park are numerous remnants of settlements, fortifications and medieval churches. Among the sacral buildings, the most valuable are the Franciscan church and monastery on the island Visovac, and the monastery Krka with a very rich treasury. On the waterfalls Roski slap and Skradinski buk are numerous mills that have historical and cultural importance as monuments of the rural architecture and economic history.