Rožnodolski potok is a small sinking stream on the southern edge of Rožnodolski hollow, located between Radoha and Drvodevnik. It has headwaters in several smaller ravines on a dolomite slope, which south of the village flow into a dammed water bath – a pond. A few acres of dam, up to 1m deep, served as a watering place for livestock.
The floodplain on the southern edge of the pond has a swampy character and is overgrown with moisture-loving tree, shrub species. Water flows from the pond along a well-maintained riverbed to the fish farm, and from there towards the oesophagus in the middle of pastures.
The stream, and especially the dam, is the habitat of several species of amphibians (common frog (Rana temporaria), agile frog (Rana dalmatina), yellow-bellied toad (Bombina variegata), common toad (Bufo bufo)), stone crayfish (Austropotamobius torrentium) and some rare aquatic plants, e.g. marsh fern (Thelypteris palustris) and bogbean (Menyanthes trifoliata), which has the southernmost habitat in Slovenia here.