It is a special natural preserve and, since 1977, designated as a swamp area of international significance by the Ramsar Convention.

The lake is located 12 kilometers southeast of Subotica, 10 km away from the E75 motorway, near the villages of Šupljak and Hajdukovo.

The lake is of aeolian origin, and its bed was formed approximately 1 million years ago, as winds emptied the sand dunes along the clay plateau.

The lake and its surrounding are home to diverse habitats (aquatic, swamp, meadow and steppe), with a number of plant and animal species.

Several other rare plants found their shelter here, such as: milk-vetch (Astragalus exscapus), wind flower (Pulsatilla pratensis), sage (Salvia austriaca), herbaceous periwinkle (Vinca herbacea), golden ragwort (Senecio doria).