The six and second last waterfall, Roški slap, is exceptionally interesting due to its cascades, which the locals called the "necklace" due to the lush vegetation, mills and pillars, some of which have been restored, and much, much more.
Approximately 14 kilometres downstream from Miljacka slap is Roški slap, the sixth cascade on the Krka River. It was named after the Rog hill-fort (Rog = horn), whose ruins are barely visible today.
The canyon in this section widens into a funnel shape. The beginning of the travertine barriers is made up of a series of small cascades (called a “necklace” by the locals), while the middle portion is made up of numerous backwaters and islands. The length of the barrier is nearly 650 metres, at its widest is approximately 450 metres wide, with a total difference in altitude of 22.5 metres.
The main waterfall is found at the end of the barrier where the Krka River falls 15 metres into Visovac Lake. Travertine formations at the waterfall are made up of caves, tufts, thresholds, small barriers and tapers. The tapers appear at the base of the main waterfall and represent the specificity of the Roški slap cascades. In 1910, on the right bank of the river, the Roški slap hydroelectric plant was constructed. Over the waterfall, there is a road that dates back to Roman times.
On both riverbanks, there are numerous mills, several of which have been restored and returned to their original function. Next to the mills, there is a renovated pillar for wool production and a valjavica for washing fabrics, which have a special cultural and historical significance and as such are monuments of rural architectural and trade history. Due to their primary function and expression of rural life, these structures are considered to be ethnographic monuments. Roški slap is especially interesting due to the distinctively rich canyon vegetation which comes in contact with the dry, light and moist shady habitats.
From the Promina side, you can reach the waterfall via the road Drniš-Širitovci, and from the Bukovac side you can reach the waterfall from the village of Laškovica. From Šibenik, you can reach Roški slap via the roads Šibenik-Pakovo-Ključ-Širitovci or Šibenik-Skradin-Dubravice-Rupe-Laškovica. You can also reach Roški slap via the river from Skradinski buk on an excursion boat road provided by the Public Institution of Krka National Park.