The Dva oka is one of the five sources of the river Vrljika that never dry out.
There are many names for these two small and beautiful circular lakes connected with a small narrow canal. The lakes seem to be both restrained and calming and for this reason they serve as a meeting place for fishermen and young loves. The lake's diameter is about 40 m and its depth is around 6- 10 m with a footpath passing around them.