Only a kilometre downstream from the most magnificent waterfall, and 20.5 km from the source of the Krka, is the most modest obstacle on the river, the Rošnjak waterfall, only 8.4 m tall, and 40 m wide.
It is composed of a single tufa barrier, but with a mystic appearance, available to view only from a distance.
The locals called it the Altar. Of the tufa formations, we can see ridges, beards, and small overhangs. The vegetation is very abundant and diverse. It is overgrown with purple willow (Salix purpurea), fig (Ficus carica), hop-hornbeam (Ostrya carpinifolia), flowering ash (Fraxinus ornus), and oriental hornbeam (Carpinus orientalis).
The moss vegetation is dominated by the species of Eucladium vertcillatum, along with Palustriella commutata and Cratoneuron filicinum. Hidden in a two-hundred-metre-deep canyon, it is the only Krka waterfall where mills have not been built because of inaccessibility.