The river Krka flows in a total length of 72.5 km, 50 km of which are under the protection of the national park as a unique natural phenomenon, with seven waterfalls and a total altitude drop of 224 m.
The most attractive part of the Krka National Park in Drniš area is Roški Waterfall. The length of its travertine barriers is approximately 650 m, the maximum width of the river flow is 450 m and a total drop of the waterfall is 22.5 m. At the tallest part of the waterfall, 15 meters high, the river dives into Visovac Lake. In 1909 one of the first hydro power plants in Europe was built precisely at Roški Waterfall. Numerous mills, stamping and rolling mills, which are now ethnographic monuments, have been preserved and restored at Roški waterfall bearing witness to the economic history and the rural architecture of the region.
