It encompasses part of the Veleka river catchment area with a territory of 389.6 ha or 3.896 km2. The terrain is various, in the lower parts there are predominantly swamp areas with typical Central European flora. The reserve encompasses territory between 100 and 250 m altitude and is thus among the lowest-lying nature reserves in the country.
The Veleka river watershed area, encompassing an area of 389.6 ha or 3.896 km2, features varied terrain, with lower regions characterized by swampy areas and Central European plant life. The reserve's location, situated between 100 and 250 m altitude, contributes to its status as one of the lowest-lying nature reserves in the country.